Engine Rotating Assemblies & Rebuild Kits

Eagle Street Performance Rotating Assemblies with Silv-O-Lite Claimer Pistons

Eagle street performance rotating assemblies offer the perfect balance of strength, performance, reliability, and affordability. They include a cast steel crankshaft, Eagle "SIR" I-beam connecting rods, Silv-O-Lite claimer pistons, Perfect Circle rings, and Performance Street bearings. The kits are only available balanced. Eagle street performance rotating assemblies are the perfect choice for engines up to 500 hp. Order the model designed for your year, make, and engine application.

4.76 out of 5 stars ( 25 )

$1,076.99

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$1,533.99

Eagle Competition Rotating Assemblies

Eagle competition rotating assemblies consist of name-brand quality components for a wide range of engines at an affordable price. Depending upon your selection, these kits may feature a crankshaft, pistons, piston rings, rod and main bearings, or connecting rods. Balanced assemblies are also available. Order the model designed for fitment on your year/make vehicle and engine application.

4.54 out of 5 stars ( 35 )

$2,178.99

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$3,869.99

Eagle Street and Strip Rotating Assemblies

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.

4.41 out of 5 stars ( 87 )

$1,078.99

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$2,759.99

Scat Engine Rotating Assemblies

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.

4.25 out of 5 stars ( 134 )

$1,033.99

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$4,722.99

Federal Mogul Engine Re-Ring Kits

Federal Mogul engine re-ring kits can make your rebuild easy and inexpensive. If your present pistons are in good shape and you don't need cam bearings or an oil pump, then these kits are ideal. They include regular or moly rings, rod bearings, a gasket set, and main bearings. Some kits are also available without main bearings. Please verify all oversizes before ordering. Select the set recommended for your vehicle make and engine application.

4.52 out of 5 stars ( 92 )

$137.90

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$605.86

Summit Racing™ Chevy 350 Engine Kit Pro Packs

These Summit Racing™ Chevy 350 engine kit Pro Packs give you virtually everything you need to assemble your Chevy 350. Features include: * Your choice of forged, hypereutectic, cast, or no pistons * Your choice of Summit Racing™ Stage I, Stage II, or no connecting rods * Available with or without Summit Racing™ Engine Shop cast, 2-piece, rear main seal crankshaft * Sealed power piston rings in your choice of standard, .020, .030, .040, or .060 * Rod and main bearings available in your choice of standard, .010, .020, or .030 * Sealed Power cam bearings * High-volume oil pump assembly with stock pickup welded to the pump * Summit Racing™ True Roller timing chain * Sealants, assembly lube, Plastigage, rod bolt boots, and freeze plugs

5.0 out of 5 stars ( 1 )

$359.99

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$1,118.80

Eagle Forced Induction Competition Rotating Assemblies

Eagle forced induction competition 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. Based on your application, balanced assemblies are also available.

Not Yet Reviewed

$3,156.99

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$3,518.99

Scat Modern Muscle Engine Rotating Assemblies

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.

4.67 out of 5 stars ( 3 )

$1,839.99

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$3,836.99

Eagle Street Performance Rotating Assemblies with Keith Black Pistons

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

$1,913.99

Callies Compstar Speed Packs

What's the easiest way to build high-quality rotating assemblies? Callies Compstar Speed Packs! Using components specially chosen for each application, Speed Packs are built around reliable 4340 forged steel Compstar crankshafts and connecting rods. Callies adds proven "brand name" components—forged aluminum performance pistons, ring sets, locks, and rod and main bearings—creating perfectly matched performance assemblies and a successful outcome for your project. Callies is serious about their quality and your success. Every Speed Pack crankshaft is dynamically balanced to components that are weight-matched to exact tolerances. You won't have to guess if you've paired the right components for power. Save by making the winning choice—Callies Compstar Speed Packs—the best choice for you, your car, and your wallet!

5.0 out of 5 stars ( 1 )

$2,850.00

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$4,802.98

Eagle Street Performance Rotating Assemblies with Speed Pro Pistons

Eagle street performance rotating assemblies with Speed Pro 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.

3.0 out of 5 stars ( 1 )

$1,163.99

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$1,642.99

Eagle Hi-Compression Competition Rotating Assemblies

Eagle Hi-Compression competition rotating assemblies consist of name-brand quality components. These engine rotating kits have been engineered for race fuels, including alcohol, methanol, and ethanol. Get a jump on the competition—and start making more horsepower today. Order the model designed for your vehicle year/make and engine application. Includes: * Eagle 4340 steel crankshaft * 3-D forged 4340 connecting rods with L-19 rod bolts * King rod and main bearings * Premium forged pistons * Plasma-moly file-fit rings

1.0 out of 5 stars ( 1 )

$3,097.99

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$3,584.99

Eagle Pro Street Rotating Assemblies

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.

5.0 out of 5 stars ( 1 )

$1,864.99

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$3,156.99

Eagle Heavy-Duty Rotating Assemblies

Eagle rotating assemblies can take a lot of worry out of your engine building project. Eagle's heavy-duty rotating assemblies consist of name-brand quality components for a wide range of engines at an affordable price. Perfect for the most extreme competition engines, including exotic fuels, heavy nitrous, and high boost, Eagle's HD rotating assemblies are equipped with Eagle's forged 4340 center-counterweighted crank (when available), forged H-Beam rods with ARP 2000 or L19 bolt upgrade and purpose-built heavy duty pistons. The pistons used in Eagle's heavy-duty assemblies are built for high boost levels or bucket-loads of nitrous. Every part is top-of-the-line and ready to support whatever you want to throw at it. Most all assemblies are available balanced or unbalanced if you'd rather your machine shop balance it. Along with crank, rods, pistons, every assembly includes bearings from either King or Clevite and rings suited to the intended application. Externally balanced assemblies balanced by Eagle will also include a harmonic damper and flexplate (or flywheel for some Fords) from Pioneer. Order the model designed for fitment on your year/make vehicle and engine application.

Not Yet Reviewed

$2,759.99

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$3,584.99

Eagle Rod, Piston, and Ring Kits

These Eagle rod, piston, and ring kits are made with high-quality components. Each kit features file fit plasma-moly rings, 3D-forged 4340 steel connecting rods, and hypereutectic or forged aluminum pistons. These kits are the perfect combination of strength and performance from Eagle.

Not Yet Reviewed

$3,241.99

S&S Cycle 89 in. Stock Bore Cylinder Kits

S&S Cycle offers 89 in. stock bore cylinder kits for various Harley-Davidson® motorcycles, allowing for easy upgrades on a variety of models. One of the key advantages of using one of these S&S Cycle cylinder kits is that they use the stock cylinder bore, and often requires minimal machining or crankcase splitting, making installation relatively straightforward compared to larger big bore kits. There are several benefits of using one of these to upgrade your bike's performance, including increased engine displacement without major modifications to the stock engine, maintaining the original look, cost-effectiveness compared to full big bore kits, and often requiring minimal machining or crankcase splitting for installation. Even with a relatively small displacement increase to 89 cubic inches, the engine will experience a noticeable power boost compared to the stock configuration. To optimize performance, consider upgrading other engine components like pistons, cams, and exhaust systems alongside this S&S Cycle stock bore cylinder kit. Select the kit specifically designed for your Harley® model and year.

Not Yet Reviewed

$1,282.95

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$1,441.95

S&S Cycle 103 in. Sidewinder Big Bore Stroker Kits

S&S Cycle offers 103 in. Sidewinder Big Bore Stroker kits for a variety of Harley-Davidson© street bikes from the 1970s and '80s. These kits are an economical route to a larger displacement engine. They contain nearly everything needed to take a stock 74 in. or 80 in. H-D© shovelhead engine up to 103 in. displacement. Kits include S&S 3 5/8 in. bore high tensile cast iron Sidewinder cylinders and forged pistons with wristpin and rings, a 5 in. stroke small diameter dynamically balanced S&S flywheel assembly, complete with S&S heavy-duty connecting rods and mainshafts, S&S stainless steel headbolts, base nut, S&S adjustable chromoly steel pushrods, head gaskets, base gaskets, exhaust gaskets, and an S&S heavy-duty top motor mount. Compression is 9.7:1.

Not Yet Reviewed

$4,399.95

Summit Racing™ Pro LS 6.0L Rotating Assemblies

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.

5.0 out of 5 stars ( 8 )

$2,608.87

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$2,960.87

Summit Racing™ Pro LS Piston and Rod Kits

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 * Precision wrist pins and retainers * 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

4.84 out of 5 stars ( 19 )

$1,479.97

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$1,662.97

Summit Racing™ Chevy 350 Engine Kits

As your number-one source for high performance, it only seems right to offer you these Chevy 350 engine kits. They feature Summit Racing™ brand components, matched for optimal performance by our tech experts, so you can get the rebuild components that you need without taking the time to do all of the research. These convenient, affordable kits are available with standard or oversize pistons and standard or undersize bearings. Each kit includes: * T5 heat-treated hypereutectic pistons * Cast iron rings * Bimetal main, rod, and cam bearings * Brass freeze plugs * High-volume iron oil pump * Gaskets * Plastigage and assembly lube

4.23 out of 5 stars ( 13 )

$488.90

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$506.90

Summit Racing™ Pro LS 5.7L Rotating Assemblies

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.

4.25 out of 5 stars ( 4 )

$2,610.87

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$2,960.87

Summit Racing™ Re-Ring Kits

As your number-one source for high performance, it only seems right to offer you these re-ring kits. They feature Summit Racing™ brand components matched for optimal performance by our tech experts, so you can get the rebuild components that you need without taking the time to do all of the research. These convenient, affordable kits are designed to work with standard or oversize pistons and standard or undersize bearings.

3.85 out of 5 stars ( 41 )

$133.96

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$135.96

Summit Racing™ Pro LS 5.3L Rotating Assemblies

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

$2,608.87

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$2,958.87

Summit Racing™ Pro LS Crank and Rod Kits

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.

4.0 out of 5 stars ( 1 )

$1,599.98