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Eagle Street and Strip rotating assemblies consist of name-brand quality components for a wide range of engines at an affordable price. These kits feature a crankshaft, pistons, piston rings, rod and main bearings, and connecting rods. Based on your application, balanced assemblies are also available. Order the model designed for fitment on your year/make vehicle and engine application.
( 85 )
$1,509.99
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$2,259.99
Scat engine rotating assemblies are available with either a high-quality Scat forged 4340 crankshaft or Scat's Series 9000 cast crankshaft, plus I-beam or H-beam connecting rods with 7/16 in. or 3/8 in. cap screw bolts. For maximum power and reliability, Scat adds rod and main bearings from King, Federal Mogul, or Clevite 77, depending upon the application—and pistons and piston rings made by such well-known manufacturers as SRP/JE, Ross, KB, Mahle, Diamond, and Probe. Kits with cast and standard forged pistons have standard rings; kits with premium forged pistons have file-fit rings. Nearly 800 Scat kits are available; order the package tailored for fitment with your engine application.
( 126 )
$1,508.99
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$2,137.99
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 )
$1,501.97
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$1,509.97
Summit Racing™ Pro LS crank 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. Order the kit recommended for your vehicle and engine. 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.
( 1 )
$1,539.98
Eagle street performance rotating assemblies with Keith Black pistons offer the perfect balance of strength, performance, reliability, and affordability. These rotating assemblies include a cast steel crankshaft, Eagle "SIR" I-beam connecting rods, hypereutectic pistons, rings, and bearings. Eagle rotating assemblies are test-fitted in house to ensure everything works well together. Take the worry out of your engine build project with an Eagle rotating assembly designed for your year, make, and engine application.
Not Yet Reviewed
$1,819.99
Eagle Pro Street rotating assemblies consist of name-brand quality components for a wide range of applications at an affordable price. These kits feature a crankshaft, pistons, piston rings, rod and main bearings, and connecting rods.
( 1 )
$1,519.99
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$2,349.99
Scat Modern Muscle engine rotating assemblies are available with high-quality Scat forged 4340 crankshafts and I-beam or H-beam connecting rods with 7/16 in. cap screw bolts. For maximum power and reliability, Scat adds rod and main bearings from King, Federal Mogul, or Clevite 77, depending upon the application, and pistons and piston rings made by such well-known manufacturers as SRP/JE, Ross, KB, Mahle, Diamond, and Probe.
( 3 )
$1,839.99
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$2,002.99
Why put your bike engine back together with stock parts—when you can upgrade with one of the S&S Cycle flywheel assemblies? These 3-piece units are forged and heat-treated from 4140 steel, making them harder and stronger than stock. They're precision-machined to be truer (for less vibration), and are assembled with integral mainshafts and lightweight connecting rod forgings. Stock flywheels shift out of true under heavy loads; improve your motorcycle with an S&S Cycle flywheel assembly.
Not Yet Reviewed
$1,542.56
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$1,599.95
S&S Cycle 106 in. Big Bore Hot Set-Up cylinder kits are easy to install. No machining or rebalancing is required, and the engine does not need to be removed from the chassis. With these kits, the resulting 106 in. engine has a compression ratio of 10:1, is stock height (no frame clearance problems), and a stock EFI throttle body will fit. Kits include: * 3.927 in. bore pistons, rings, wrist pins * Big bore cylinders finished in wrinkle black powder coat * 585C chain drive Easy Start camshafts * Chromoly steel adjustable pushrods * High performance tappets * Gaskets
Not Yet Reviewed
$1,820.95
S&S Cycle's 111 in. Hot Set Up kits are tailored with the necessary components for your specific Harley-Davidson® model. Using this kit on the stock crankcases provides the benefit of significantly increasing your engine displacement and horsepower without requiring a complete engine rebuild. This allows you to maintain your original engine serial numbers while experiencing noticeable performance gains with a relatively simple installation process, all while utilizing your existing crankcases which can be cost-effective compared to a full engine replacement. After installation, proper tuning on a dyno is recommended to optimize engine performance.
Not Yet Reviewed
$1,534.95
S&S Cycle 117 in. big bore kits are a popular choice for riders looking to upgrade their engine power without major modifications. Available for a variety of Harley-Davidson® motorcycles, each kit is tailored with the necessary components for your specific HD® model. Many kits come with a powdercoat finish that can match the stock engine look to maintain a clean aesthetic. Using one of S&S Cycle's big bore kits can provide significant benefits like a noticeable increase in horsepower and torque due to the larger engine displacement, relatively easy installation with minimal machine work required, a quality build with durable components, and a good balance of performance and reliability. For best performance, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required. Although not mandatory, S&S Cycle recommends adding an oil cooler to bikes ridden in warmer climates. Select the S&S Cycle big bore kit designed for your application needs.
Not Yet Reviewed
$1,595.95
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$1,599.95
S&S Cycle 124 in. (standard compression) Hot Set-Up cylinder kits package pistons and cylinders for use as replacements or as the basis for a new engine build. The pistons are a flat dome design, and the cylinders are machined with the stock bolt pattern intended for use in stock crankcases. Select the appropriate kit for your Big Twin. S&S cylinder and piston kit contents and notes: * S&S 4 1/8 in. bore cylinders -- Durable wrinkle black powdercoat finish * Forged flat domed pistons, rings, wrist pins * Head and base gaskets * Designed for 4 5/8 in. flywheels, resulting in 124 in. displacement * Cylinders can be used with stock or S&S cylinder heads with stock bolt pattern
Not Yet Reviewed
$1,595.95
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$1,679.95
The S&S Cycle V111 cylinder kits are an exceptional choice for riders who choose to re-work their bikes for more power. This 4 1/8 in. bore cylinder and piston kit by S&S Cycle replaces the cylinders and pistons on early production S&S V111 engines for 1984-1999 Big Twins. With top-of-the-line components, the V111 cylinder kits include S&S 4 1/8 in. bore cylinders, forged pistons, rings, wrist pins, head and base gaskets. Pistons are flat topped design intended for use with S&S Super Stock cylinder heads. The cylinders are machined with the S&S bolt pattern and are intended for use in S&S crankcases used in early S&S V111 engines. Designed for 4 3/8 in. stroke flywheels, resulting in 111 in. displacement. For best performance expectations, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required.
Not Yet Reviewed
$1,525.95
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$1,652.95
The S&S Cycle V124 cylinder kits are an exceptional choice for riders who choose to re-work their bikes for more power. This 4 1/8 in. bore cylinder and piston kit by S&S Cycle replaces the cylinders and pistons on early production S&S V124 engines for 1984-1999 Big Twins. With top-of-the-line components, the V124 cylinder kits include S&S 4 1/8 in. bore cylinders, forged pistons, rings, wrist pins, head and base gaskets. Pistons are flat topped design intended for use with S&S Super Stock cylinder heads. The cylinders are machined with the S&S bolt pattern and are intended for use in S&S crankcases used in early S&S V124 engines. Designed for 4 3/8 in. stroke flywheels, resulting in 124 in. displacement. For best performance expectations, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required.
Not Yet Reviewed
$1,525.95
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$1,611.95
The S&S Cycle V117 cylinder kits are an exceptional choice for riders who choose to re-work their bikes for more power. This 4 1/8 in. bore cylinder and piston kit by S&S Cycle replaces the cylinders and pistons on early production S&S V117 engines for 1984-1999 Big Twins. With top-of-the-line components, the V117 cylinder kits include S&S 4 1/8 in. bore cylinders, forged pistons, rings, wrist pins, head and base gaskets. Pistons are flat topped design intended for use with S&S Super Stock cylinder heads. The cylinders are machined with the S&S bolt pattern and are intended for use in S&S crankcases used in early S&S V117 engines. Designed for 4 3/8 in. stroke flywheels, resulting in 117 in. displacement. For best performance expectations, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required.
Not Yet Reviewed
$1,514.95
The T124 cylinder kits from S&S Cycle are an exceptional choice for riders who choose to re-work their bikes for more power. This 4 1/8 in. bore cylinder and piston kit replaces the cylinders and pistons on early production S&S T124 engines for 1999-2006 Big Twins. The T124 cylinder kits include top-of-the-line components: S&S 4 1/8 in. bore cylinders, forged pistons, rings, wrist pins, head and base gaskets. Pistons are flat topped design intended for use with S&S Super Stock cylinder heads. The cylinders are machined with the S&S bolt pattern and are intended for use in S&S crankcases used in early S&S T124 engines. Designed for 4 3/8 in. stroke flywheels, resulting in 124 in. displacement. For best performance expectations, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required.
Not Yet Reviewed
$1,587.95
S&S Cycle's T117 cylinder kits are an exceptional choice for riders who choose to re-work their bikes for more power. This 4 1/8 in. bore cylinder and piston kit replaces the cylinders and pistons on early production S&S T117 engines for 1999-2006 Big Twins. With top-of-the-line components, these S&S Cycle T117 cylinder kits contain the following: S&S 4 1/8 in. bore cylinders, forged pistons, rings, wrist pins, head and base gaskets. Pistons are flat topped design intended for use with S&S Super Stock cylinder heads. The cylinders are machined with the S&S bolt pattern and are intended for use in S&S crankcases used in early S&S T117 engines. Designed for 4 3/8 in. stroke flywheels, resulting in 117 in. displacement. For best performance expectations, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required.
Not Yet Reviewed
$1,699.95
S&S is one of the most trusted names within the community of riders who choose to re-work their bikes for more power. The S&S Cycle T111 cylinder kits are an exceptional choice for upgrading your Twin Cam powered bike, delivering an economical and efficient route to enhanced performance. These kits are intended for replacing the cylinders and pistons on early production S&S T111 engines for 1999-2006 Big Twins. The kits contain top-of-the-line components such as S&S 4 1/8 in. bore cylinders, forged pistons, rings, wrist pins, head and base gaskets. Pistons are flat topped design intended for use with S&S Super Stock cylinder heads. The cylinders are machined with the S&S bolt pattern and are intended for use in S&S crankcases used in early S&S T111 engines. Designed for 4 1/8 in. stroke flywheels, resulting in 111 in. displacement. Cylinder available in either a silver or a durable wrinkle black powdercoat finish. For best performance, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required.
Not Yet Reviewed
$1,611.95
An 883 to 1200cc Hooligan cylinder kit for a Harley-Davidson®, like the ones made by S&S Cycle, provides a significant increase in engine displacement, resulting in substantially more power and torque without requiring major engine modifications, making it a popular upgrade for riders seeking better performance on their Sportster 883, with benefits like increased horsepower—by boosting the engine size from 883cc to 1200cc, the Hooligan kit delivers a noticeable power gain, allowing for better acceleration and highway cruising capabilities. Typically these kits are designed as "bolt-on" upgrades, meaning they can be installed without needing extensive machining or engine rebalancing, making the process relatively simple and straightforward. Compared to a complete engine rebuild, a Hooligan kit is a cost-effective way to significantly improve your bike's power. When installing a Hooligan kit, it may be necessary to upgrade the clutch to handle the increased torque produced by the larger engine. Depending on the specific kit and your bike setup, you may need to adjust fuel injection mapping to optimize performance.
Not Yet Reviewed
$1,742.95
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$1,999.95
Whether you are looking for better acceleration for everyday riding or more power for spirited driving, S&S Cycle 1200cc to 1250cc Hooligan cylinder kits provide a noticeable improvement. The larger displacement from 1200cc to 1250cc directly translates to more power, making the bike faster and more responsive, especially noticeable in acceleration and mid-range torque. These kits are designed to be "bolt-on" meaning they can be installed without needing to machine the engine cases or rebalance the crankshaft, making the upgrade process fairly straightforward. Each kit is tailored with the necessary components for your specific HD® model. Most Hooligan kits utilize the existing stock heads, pushrods, and fuel system, minimizing the need for additional parts or adjustments. Compared to a full engine rebuild or custom build, S&S Cycle's Hooligan kits are a relatively affordable way to significantly improve performance. Select the kit designed for your application needs.
Not Yet Reviewed
$1,709.95
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$1,742.95
The S&S Cycle 129 in. big bore cylinder kits for a Harley-Davidson® motorcycle provides a significant increase in engine displacement, leading to substantially more power and torque, especially in the low and mid-range, while still maintaining compatibility with the stock crankcases for a noticeable performance boost. These kits essentially, give your bike a "bigger punch" without requiring extensive structural changes. Big bore kits often provide a noticeable improvement in low-end torque, making the bike more responsive in everyday riding situations. Most 129 in. kits are designed to work with stock crankcases and other engine components, simplifying installation. Many kits maintain the factory engine appearance with powdercoat finishes, giving the bike a subtle look that belies its enhanced performance. To fully optimize the performance gains from a big bore kit, additional tuning adjustments like adjusting the fuel injection system or changing the camshaft may be necessary. Each 129 in. big bore cylinder kit is tailored with the necessary components for your specific bike model. Select the kit that's designed specifically for your model and engine to ensure proper fitment.
Not Yet Reviewed
$1,595.95
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$1,599.95
The S&S Cycle 132 in. big bore cylinder kits for a Harley-Davidson® motorcycle provides a significant increase in engine displacement, resulting in a substantial boost in horsepower and torque. This in turn makes the bike significantly faster with more power across the powerband, particularly noticeable in low and mid-range acceleration, while still maintaining compatibility with stock crankcases and retaining the stock engine height, offering a "sleeper" advantage with minimal visual modification. These big bore cylinder kits are typically designed to work with existing engine components like the stock head gaskets and flywheels. This makes installing them a significant investment compared to other performance upgrades. Each kit is tailored with the necessary components for your specific model. Many kits feature a powdercoat finish that closely matches the factory look. To fully optimize increased power, proper tuning with adjustments to fuel injection and ignition timing may be necessary. Order the 132 in. big bore cylinder kit designed specifically for your HD® model and engine to ensure proper fitment.
Not Yet Reviewed
$1,599.95
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$1,649.95
S&S Cycle Shovelhead cylinder sets for Big Twin engines are available in different sizes. They are made from high-strength engineering-grade gray cast iron with a durable powdercoat finish for excellent wear resistance. Select the cylinder set designed for your motorcycle engine.
Not Yet Reviewed
$1,599.95
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$1,699.95
S&S Cycle's 88 in. big bore kits provide significant benefits by increasing the engine displacement, resulting in more power and torque, especially noticeable in the low to mid-range powerband, while generally maintaining the stock engine character and rideability; essentially giving the bike a stronger punch with increased acceleration without drastically altering its feel. The larger bore size allows for more air and fuel to be ingested per combustion cycle, leading to a noticeable boost in power output, particularly in the low and mid-range rpm bands. For riders who frequently haul loads, the increased torque can be beneficial for pulling heavier trailers or carrying extra cargo. Many 88 in. big bore kits are designed to work with mostly stock components, requiring minimal additional engine modifications for installation. Compared to other performance upgrades like high-lift cams or forced induction, a big bore kit is often considered a cost-effective way to significantly increase engine power. After installing a big bore kit, proper engine tuning with adjustments to the fuel injection or carburetor settings is crucial to optimize performance and ensure efficient combustion. Select the S&S Cycle big bore kit specifically designed for your HD® model and year.
Not Yet Reviewed
$1,999.95
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