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Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched...
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your...
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your daily driver.
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URO Parts accessory belt tensioners and tensioner assemblies are designed and manufactured to withstand the impact today's worsening traffic conditions place on an engine and its accessory drives. Their drive belt tensioners are manufactured with premium materials and bearings to outlast other European brands … at a fraction of the cost of OE. Every URO manufacturing facility is ISO 9000 certified; plus, all URO Parts accessory belt tensioners and tensioner assemblies undergo intensive testing and inspection to make certain that each part meets or exceeds OE standards for fit, function, durability, and design.
( 2 )
$66.99
Summit Racing™ Pro LS piston and rod kits deliver industry-leading fit, finish, and durability at an affordable price. These assemblies are tested to over 1,200 hp in turbo applications. They're available in a broad range of fitment and performance options. Standard features and specs may include: * 4340 forged H-beam connecting rods * Designed for 5,000 ft./min. average piston speed in street and drag applications * 7/16 ARP 2000 rod bolts with 200,000 psi tensile strength; dual-ribbed caps for maximum strength * Added stroker clearance and balanced to within +/- 1 gram per end * Full-floating and precision-honed in the USA to +/- .0001 in. * 2618 forged aluminum pistons * Ultra-modern 2618 alloy forgings for boost and nitrous with maximum ring land thickness * Pressure-fed pin oiling with durable chromium steel wrist pins * Specially profiled and coated piston skirts for stroker applications with tight piston-to-wall clearance * Generous valve reliefs for extra piston-to-valve clearance accommodate cathedral and rectangle heads * Premium steel piston rings * Steel top rings designed for maximum life with boost and nitrous * File-fit rings for maximum ring seal, reduced friction, and tensions optimized for wet-sump engines * Martensitic ductile Napier-hook second rings for strength and maximum oil control
( 19 )
$1,470.97
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$1,505.97
S&S Cycle offers 129 in. power packages with chain drive cam for a variety of Harley-Davidson© street bikes from 2017 and up. These packages are the ideal combination of performance and savings designed to transform your engine from mild to wild. They combine S&S's biggest big bore cylinders with matched 550 cam/cam-plate/oil pump and everything else a high performance cam chest needs to make big, reliable horsepower. Transform your 107 in. into a 129 in. monster. Additional details: * Available with 129 in. Big Bore pistons/cylinders * 550 lift cam for the perfect combination of horsepower and torque * Works with stock crankcases * Powdercoat finish matched to factory * MLS (multi-layered steel) head gaskets * Includes tappets, tappet cuffs, and high lift springs * Includes 129 cam cover badge
Not Yet Reviewed
$3,359.95
Summit Racing™ Pro LS 6.0L forged rotating assemblies provide industry-leading fit, finish, and durability at an affordable price. These kits are tested to over 1,200 hp in turbo applications. They're available in a wide range of fitment and performance options. Standard features and specs may include: * 4340 forged steel crank * Core hardened to optimum strength, tempered, and nitride hardened * Lightening rod journals, gun-drilled mains, and profiled counterweights for better engine acceleration * Maximum journal tolerances of +/- .0001 to ensure consistent bearing clearance * Straight-shot oiling for maximum oil film strength at the maximum load angle * 4340 forged H-beam connecting rods * Designed for 5,000 ft./min. average piston speed in street and drag applications * 7/16 ARP 2000 rod bolts with 200,000 psi tensile strength; dual ribbed caps for maximum strength * Added stroker clearance and balanced to within +/- 1 gram per end * Full-floating and precision-honed in the USA to +/- .0001 in. * 2618 forged aluminum pistons * Ultra-modern 2618 alloy forgings for boost and nitrous with maximum ring land thickness * Pressure-fed pin oiling with durable chromium steel wrist pins * Specially profiled and coated piston skirts for stroker applications with tight piston-to-wall clearance * Generous valve reliefs for extra piston-to-valve clearance accommodate cathedral and rectangle heads * Premium steel piston rings * Steel top rings designed for maximum life with boost and nitrous * File-fit rings for maximum ring seal, reduced friction, and tensions optimized for wet sump engines * Martensitic ductile Napier-hook second rings for strength and maximum oil control * Premium main and rod bearings * Clevite H-bearings are designed for high-rpm operation in racing applications * Tri-metal bearings designed with high bearing crush for maximum retention * Medium eccentricity shells with precision wall tolerance of +/- .00015 in.
( 8 )
$2,514.87
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$2,803.87
March's serpentine pulleys are available in a 25 percent underdrive to free up extra horsepower or a high water flow ratio to help increase cooling in those hot-running street rods. They're machined on precision CNC equipment and come in steel or aluminum. The steel pulleys are machined from tough billet steel for strength and are given a high-gloss, black powdercoated finish. The aluminum pulleys are machined from 6061-T6 billet aluminum and are given a polished finish for good looks.
( 16 )
$491.99
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$1,199.99
Summit Racing™ Pro LS 6.2L forged rotating assemblies provide industry-leading fit, finish, and durability at an affordable price. These kits are tested to over 1,200 hp in turbo applications. They're available in a wide range of fitment and performance options. Standard features and specs may include: * 4340 forged steel crank * Core hardened to optimum strength, tempered, and nitride hardened * Lightening rod journals, gun-drilled mains, and profiled counterweights for better engine acceleration * Maximum journal tolerances of +/- .0001 to ensure consistent bearing clearance * Straight-shot oiling for maximum oil film strength at the maximum load angle * 4340 forged H-beam connecting rods * Designed for 5,000 ft./min. average piston speed in street and drag applications * 7/16 ARP 2000 rod bolts with 200,000 psi tensile strength; dual ribbed caps for maximum strength * Added stroker clearance and balanced to within +/- 1 gram per end * Full-floating and precision-honed in the USA to +/- .0001 in. * 2618 forged aluminum pistons * Ultra-modern 2618 alloy forgings for boost and nitrous with maximum ring land thickness * Pressure-fed pin oiling with durable chromium steel wrist pins * Specially profiled and coated piston skirts for stroker applications with tight piston-to-wall clearance * Generous valve reliefs for extra piston-to-valve clearance accommodate cathedral and rectangle heads * Premium steel piston rings * Steel top rings designed for maximum life with boost and nitrous * File-fit rings for maximum ring seal, reduced friction, and tensions optimized for wet sump engines * Martensitic ductile Napier-hook second rings for strength and maximum oil control * Premium main and rod bearings * Clevite H-bearings are designed for high-rpm operation in racing applications * Tri-metal bearings designed with high bearing crush for maximum retention * Medium eccentricity shells with precision wall tolerance of +/- .00015 in.
( 3 )
$2,514.87
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$2,809.87
Summit Racing™ Pro LS 5.3L forged rotating assemblies provide industry-leading fit, finish, and durability at an affordable price. These kits are tested to over 1,200 hp in turbo applications. They're available in a wide range of fitment and performance options. Standard features and specs may include: * 4340 forged steel crank * Core hardened to optimum strength, tempered, and nitride hardened * Lightening rod journals, gun-drilled mains, and profiled counterweights for better engine acceleration * Maximum journal tolerances of +/- .0001 to ensure consistent bearing clearance * Straight-shot oiling for maximum oil film strength at the maximum load angle * 4340 forged H-beam connecting rods * Designed for 5,000 ft./min. average piston speed in street and drag applications * 7/16 ARP 2000 rod bolts with 200,000 psi tensile strength; dual ribbed caps for maximum strength * Added stroker clearance and balanced to within +/- 1 gram per end * Full-floating and precision-honed in the USA to +/- .0001 in. * 2618 forged aluminum pistons * Ultra-modern 2618 alloy forgings for boost and nitrous with maximum ring land thickness * Pressure-fed pin oiling with durable chromium steel wrist pins * Specially profiled and coated piston skirts for stroker applications with tight piston-to-wall clearance * Generous valve reliefs for extra piston-to-valve clearance accommodate cathedral and rectangle heads * Premium steel piston rings * Steel top rings designed for maximum life with boost and nitrous * File-fit rings for maximum ring seal, reduced friction, and tensions optimized for wet sump engines * Martensitic ductile Napier-hook second rings for strength and maximum oil control * Premium main and rod bearings * Clevite H-bearings are designed for high-rpm operation in racing applications * Tri-metal bearings designed with high bearing crush for maximum retention * Medium eccentricity shells with precision wall tolerance of +/- .00015 in.
Not Yet Reviewed
$2,539.87
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$2,802.87
Summit Racing™ Pro LS 5.7L forged rotating assemblies provide industry-leading fit, finish, and durability at an affordable price. These kits are tested to over 1,200 hp in turbo applications. They're available in a wide range of fitment and performance options. Standard features and specs may include: * 4340 forged steel crank * Core hardened to optimum strength, tempered, and nitride hardened * Lightening rod journals, gun-drilled mains, and profiled counterweights for better engine acceleration * Maximum journal tolerances of +/- .0001 to ensure consistent bearing clearance * Straight-shot oiling for maximum oil film strength at the maximum load angle * 4340 forged H-beam connecting rods * Designed for 5,000 ft./min. average piston speed in street and drag applications * 7/16 ARP 2000 rod bolts with 200,000 psi tensile strength; dual ribbed caps for maximum strength * Added stroker clearance and balanced to within +/- 1 gram per end * Full-floating and precision-honed in the USA to +/- .0001 in. * 2618 forged aluminum pistons * Ultra-modern 2618 alloy forgings for boost and nitrous with maximum ring land thickness * Pressure-fed pin oiling with durable chromium steel wrist pins * Specially profiled and coated piston skirts for stroker applications with tight piston-to-wall clearance * Generous valve reliefs for extra piston-to-valve clearance accommodate cathedral and rectangle heads * Premium steel piston rings * Steel top rings designed for maximum life with boost and nitrous * File-fit rings for maximum ring seal, reduced friction, and tensions optimized for wet sump engines * Martensitic ductile Napier-hook second rings for strength and maximum oil control * Premium main and rod bearings * Clevite H-bearings are designed for high-rpm operation in racing applications * Tri-metal bearings designed with high bearing crush for maximum retention * Medium eccentricity shells with precision wall tolerance of +/- .00015 in.
( 3 )
$2,541.87
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$2,804.87
S&S Cycle offers 128 in. power packages with chain drive cam for a variety of Harley-Davidson© street bikes from 2017 and up. Kit details include: BIG BORE KIT: * 4.250 in. bore * Forged pistons * 11.1:1 compression ratio OIL PUMP/CAM PLATE: * Precision-machined from billet aluminum * Passage plugs removable for servicing * Independent scavenge sections for flywheel cavity and cam chest * Debris screens in both scavenge pickups * Magnet in cam chest to help stop debris from entering oil pump * Increased flow capacity on both feed and scavenge side * Pressure relief valve is adjustable with unit installed in engine * Kits now include updated oil pump with groove for optional OEM oil seal PUSHRODS: * Quickee pushrods with chrome covers TAPPETS: * Hand-assembled to exacting tolerances * Reduced valvetrain noise from start-up to shut-down * Close tolerances for low leak-down rates * Fast pump-up and superior high-RPM performance TAPPET CUFFS: * Hard anodized black coating * Billet aluminum construction * Stronger than stock material eliminates distortion * Improve tappet stability in high lift and high RPM situations CAM: * S&S 550 cam—designed for big bore applications * Available in both chain drive and gear drive variations VALVE SPRINGS: * Work well with cams up to .605 lift * High performance conical single-wire spring * Includes top collars, keepers, and valve seals/bottom collars CAM CHAIN TENSIONER: * Precision-machined from billet aluminum * Thicker shoe for longer wear * Direct chain oiling * Larger piston for more consistent pressure * Tighter tolerances improve stability
Not Yet Reviewed
$3,265.95
S&S Cycle offers 128 in. power packages with gear drive cam for a variety of Harley-Davidson© street bikes from 2017 and up. Kit details include: BIG BORE KIT: * 4.250 in. bore * Forged pistons * 11.1:1 compression ratio OIL PUMP/CAM PLATE: * Precision-machined from billet aluminum * Passage plugs removable for servicing * Independent scavenge sections for flywheel cavity and cam chest * Debris screens in both scavenge pickups * Magnet in cam chest to help stop debris from entering oil pump * Increased flow capacity on both feed and scavenge side * Pressure relief valve is adjustable with unit installed in engine * Kits now include updated oil pump with groove for optional OEM oil seal PUSHRODS: * Quickee pushrods with chrome covers TAPPETS: * Hand-assembled to exacting tolerances * Reduced valvetrain noise from start-up to shut-down * Close tolerances for low leak-down rates * Fast pump-up and superior high-RPM performance TAPPET CUFFS: * Hard anodized black coating * Billet aluminum construction * Stronger than stock material eliminates distortion * Improve tappet stability in high lift and high RPM situations CAM: * S&S 550 cam—designed for big bore applications * Gear drive kits provide improved cam timing accuracy and eliminate stock chain tensioner * Gear drive kits include outer drive gears VALVE SPRINGS: * Work well with cams up to .605 lift * High performance conical single-wire spring * Includes top collars, keepers, and valve seals/bottom collars
Not Yet Reviewed
$3,460.95
Upgrade your entire cam chest with S&S Cycle Milwaukee 8 chain drive cam chest kits! The parts in each kit are matched to ensure superior quality, fit, finish, and performance, and will include the necessary gaskets, components, and hardware required for a complete installation. S&S Cycle chain drive kits are available for water-cooled and oil-cooled motorcycle models. Select the kit designed to fit your bike. Features of Milwaukee 8 chain drive cam chest kits: * Oil pump and cam plate are precision-machined from billet aluminum with a blue anodized finish * Passage plugs are removable for servicing * Independent scavenge sections for the flywheel cavity and cam chest * Debris screens in both scavenge pickups * Magnet in cam helps stop debris from entering oil pump * Increased oil flow capacity on both the feed and scavenge sides * Adjustable pressure relief valve is adjustable with the unit installed in the engine * S&S Quickee pushrods with chrome or gloss black pushrod tubes * S&S premium tappets—hand assembled to exacting tolerances; reduced valve train noise from start up to shut down * Billet aluminum tappet cuffs have a hard-anodized black coating and are stronger than stock to eliminate distortion and improves tappet stability in high-lift situations * Precision machined billet aluminum cam chain tensioner * 465 Torque cam kits are the ideal choice for Touring bike applications * 475 kits are bolt-in cams that can produce up to 100 horsepower * 540 kits are designed to add even more stump pulling torque to your big bore M8, for those that keep the revs below 6,000 rpm—requires the addition of valve springs (included in high lift kits) and works with cams up to .605 lift * 550 kits are for use with large displacement engines—requires the addition of valve springs (included in high lift kits) and works with cams up to .605 lift
Not Yet Reviewed
$1,580.95
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$1,621.95
S&S Cycle Milwaukee 8 gear drive cam chest kits include everything necessary to convert to gear drive for improved cam timing accuracy and eliminate the stock cam chain tensioner. All parts in each kit are matched to ensure superior quality, fit, finish and performance. Each kit includes necessary gaskets, components, and hardware required for a complete installation. S&S gear drive kits are available for water-cooled and oil-cooled motorcycle models. Select the kit designed for your bike. Features of Milwaukee 8 gear drive cam chest kits: * Oil pump and cam plate are precision-machined from billet aluminum with a blue anodized finish * Passage plugs are removable for servicing * Independent scavenge sections for the flywheel cavity and cam chest * Debris screens in both scavenge pickups * Magnet in cam helps stop debris from entering oil pump * Increased oil flow capacity on both the feed and scavenge sides * Adjustable pressure relief valve is adjustable with the unit installed in the engine * S&S Quickee Pushrods with chrome or gloss black pushrod tubes * S&S premium tappets—hand assembled to exacting tolerances; reduced valve train noise from start up to shut down * Billet aluminum tappet cuffs have a hard-anodized black coating and are stronger than stock to eliminate distortion and improve tappet stability in high-lift situations * Outer drive gears included * 465 Torque cam kits are the ideal choice for Touring bike applications * 475 kits are bolt-in cams that can produce up to 100 horsepower * 540 kits are designed to add even more stump pulling torque to your big bore M8, for those that keep the revs below 6,000 rpm—requires the addition of valve springs (included in high lift kits) and works with cams up to .605 lift * 550 kits are for use with large displacement engines—requires the addition of valve springs (included in high lift kits) and works with cams up to .605 lift
Not Yet Reviewed
$1,599.95
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$1,815.95
JE Pistons open chamber dome top gas ported pistons are the top choice for drag race applications. These pistons have vertical gas ports, backcut top and D wall second rings (.043, .043, 3.0mm), and a low-tension oil ring. Their compression height is figured using a 9.780 in. block height with zero deck clearance. They include a pin and double Spiro locks.
Not Yet Reviewed
$1,199.99
March Performance AMC serpentine drive kits spin performance and style. These pulley and bracket units are CNC-machined from solid billet 6061-T6 aluminum that offers a perfect fit, high strength, and a spectacular look. The kits come complete with stainless steel tensioning rods, chromoly rod ends, and necessary Grade 8 mounting hardware. March AMC alternator bracket kits include: * Alternator pulley with fan and nose cover * Water pump pulley * Alternator bracket * Crank pulley Kits with power steering include everything above, plus: * Power steering pulley with nose cover * Bracket
( 3 )
$470.99
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$984.99
New styling from a proven performer! March Performance Ultra Series billet aluminum alternator brackets feature alternative, sleek styling from their original brackets. They're precision CNC-machined from solid billet 6061 T-6 aluminum for superior strength and reduced weight. The brackets will fit perfectly and handle high-torque and vibration easily. Most applications come complete with stainless steel tensioning rods and chromoly rod ends for the best operation. The powdercoated finish eliminates the hassle of polishing in those hard-to-reach places. All necessary hardware is included.
( 102 )
$108.99
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$206.99
March Performance Ultra Series Chevy Small Block serpentine systems bolt to the front of 1969 or later small block Chevy heads. Precision CNC-machined from solid billet 6061-T6 aluminum to fit perfectly and handle high torque and vibration, these bracket kits come complete with stainless steel tensioning rods and chrome moly rod ends for high performance operation. All necessary hardware included. Powdercoated to eliminate polishing in those hard to reach places. Matching serpentine pulleys are precision CNC-machined from 6061-T6 aluminum. This is the same material March uses for NASCAR pulleys! These pulleys will not fracture like common cast pulleys. High tensile strength means much longer wear. March hard coats the high-wear areas on the high-water flow ratio pulleys! The street rod ratio increase water flow and fan speed. This helps at critical low speed driving.
( 10 )
$538.99
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$1,763.99
March Performance Chevy big block serpentine drive kits simply bolt onto the front of any big block Chevy heads. The bracket kits come complete with stainless steel tensioning rods and chromoly rod ends for high performance operation. Matching serpentine pulleys are precision CNC-machined from 6061-T6 aluminum and then clear powdercoated to eliminate polishing in those hard-to-reach places. These pulleys will not fracture like common cast pulleys, since they have high tensile strength for much longer wear. The high-wear areas on these pulleys are hard coated. Their street rod ratio increases water flow and fan speed, which helps at critical low-speed driving. These performance pulleys create approximately 12 hp, depending on the accessories driven.
( 5 )
$575.99
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$863.99
Now Ford FE owners can get March Performance style and reliability. Their Ford FE serpentine kits feature a unique one-piece bracket and optional power steering brackets for mounting a Saginaw-style pump. The kits are precision CNC-machined to run perfectly true and are designed for daily street driving. They are made from 6061-T6 aluminum for extra strength and wear and are finished with a maintenance-free clear powdercoating. These Ford FE serpentine kits come complete with stainless steel tensioning rods and chromoly rod ends for high performance operation. Matching serpentine pulleys are precision CNC-machined, and all necessary hardware is included.
( 10 )
$461.99
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$840.99
Billet Specialties serpentine conversion air conditioning add-on kits are engineered with style, quality, fit, and finish. Available for small blocks and big blocks, these A/C add-ons include brackets and pulleys machined from 6061 T-6 billet aluminum. The components are then treated to either a black anodized or a beautifully mirror-polished finish. Prepared for use with their top-mount and mid-mount alternator and power steering kits, Billet Specialties serpentine conversion A/C add-on kits are designed to bolt right on and align correctly. Order the model recommended for your application. Kits feature and include: * Air conditioning bracket * Polished stainless steel turnbuckle with high-quality QA1 rod ends * Idler pulleys and compressor clutch cover * Stainless steel hardware * Comprehensive installation instructions * Exclusive dual idler pulley system for A/C kits to keep belt tension
( 2 )
$434.95
March Performance alternator and air conditioning brackets are precision CNC-machined from solid billet 6061-T6 aluminum to fit perfectly and handle high torque and vibration easily. They are designed to mount the alternator and A/C compressor up high by using a single front face plate with tensioning rods. The brackets include stainless steel mounting hardware to complete a top-notch, good looking, high-quality installation.
( 11 )
$149.99
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$353.99
March Performance Pontiac V8 serpentine conversion kits are super trick, one-belt drive systems that run off of standard-rotation 1969 or later water pumps. Using this new serpentine design will totally eliminate any belt throwing and enhance your engine compartment. The pulleys are CNC-machined from solid 6061 T-6 billet aluminum for extra strength and wear. To get perfect belt tensioning, stainless steel rods with chromoly ends are used. To eliminate polishing in those hard-to-reach places, all parts are covered with a maintenance-free clear powdercoated finish.
( 6 )
$473.99
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$2,113.99
March Performance Chevy "Ultra" electric water pump bracket kits are designed to solve the problem of how to mount accessories to engines with electric water pumps. They feature a hand-polished finish with show-quality styling and March's own no-polish clear powdercoated finish. The pulley kits are designed for use with Meziere, CSI/CSR, and Proform electric water pumps and are precision CNC-machined from solid billet 6061-T6 aluminum. This translates into a spectacular looking new machine finish with a perfect fit and extra strength. They will not fracture like common cast pulleys, since high-tensile strength means much longer wear. Ultra kits include: * Crank Pulley * Alternator bracket * Alternator fan and cover * Tensioning relocation arm * Stainless tensioning rod and rod ends * Power steering kit includes bracket and pulley * Grade 8 mounting hardware and bolts
( 7 )
$378.99
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$642.99
March Performance small block Chevy Ultra serpentine conversion kits will make it easy to convert your old V-belt pulleys. They bolt to the front of any 1969 or later small block Chevy heads and are precision CNC-machined from solid billet 6061 T-6 aluminum to fit perfectly and handle high-torque and vibration. The included bracket kits come complete with stainless steel tensioning rods and chromoly rod ends for high performance operation. Required mounting hardware is included and is powdercoated to eliminate polishing in those hard-to-reach places. Matching serpentine pulleys are precision CNC-machined from 6061 T-6 aluminum. These pulleys will not fracture like common cast pulleys because they are hard coated in the high-wear areas on their high water flow ratio pulleys. The street rod ratio increases water flow and fan speed. This helps at critical low-speed driving.
Not Yet Reviewed
$697.99
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$1,370.99
Make the switch to serpentine pulleys.March Performance Ultra Ford small block serpentine conversion kits use a unique one-piece bracket that is designed to fit both fuel injection and carbureted engines using reverse-rotation water pumps. Kits include: * Stainless steel tensioning rods * Chromoly rod ends * Crankshaft pulley * Water pump pulley with nose cover * Alternator pulley with fan and nose cover * Optional power steering pulley and brackets * Optional air conditioning pulley and brackets * Grade 8 mounting hardware
( 13 )
$592.99
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$1,199.99
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