Engine Rotating Assemblies & Rebuild Kits

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.

4.53 out of 5 stars ( 34 )

$1,927.99

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$4,804.99

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

$3,089.99

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$3,553.99

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 )

$2,679.99

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$3,619.99

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.

4.27 out of 5 stars ( 130 )

$2,138.99

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$3,546.99

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 )

$2,508.99

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$3,815.99

Cylinder Works Standard Bore Cylinder Kits

Eliminate the wait with Cylinder Works standard bore cylinder kits. They arrive ready to install, eliminating the hassle of sending out your cylinder for re-plating or boring, and they're competitively priced compared to typical re-plating costs. These cylinders look virtually identical to your OEM parts. Cylinder Works standard bore cylinder kits come in model-specific kits, so choose the one that best fits your application. Features include: * Super-convenient--just purchase and install * Nickel silicon carbide plated for long life * Honed to exact size for easy piston installation * Complete with gaskets, cylinder, and piston kit * No machine work required

4.5 out of 5 stars ( 2 )

$540.56

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$1,036.11

Hot Rods Complete Bottom End Rebuild Kits

When it's time to do a rebuild, Hot Rods complete bottom end rebuild kits are less expensive and longer lasting than OEM. These kits have all that you need to get back on track and are easy to put together. Each kit contains a crankshaft, main bearing/seals, and a complete gasket set. Water pump seals are not included. Great performance parts from Hot Rods will have you going, going, strong!

5.0 out of 5 stars ( 2 )

$804.91

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.

4.43 out of 5 stars ( 88 )

$2,879.99

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$3,839.99

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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$4,279.99

Eagle Racesaver Rotating Assemblies

Eagle Racesaver rotating assemblies are designed specifically for use in 305 Racesaver competition. Assemblies include crankshaft, rods, pistons, rings, and bearings. Select the Racesaver assembly needed for your build.

Not Yet Reviewed

$1,969.99

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$2,579.99

Summit Bucks

S&S Cycle 132 in. Power Packages with Chain Drive Cam

S&S Cycle offers 132 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. Additional details: * Available with 132 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 132 cam cover badge * 132 Power Pack: Stock heads, 550 cam, stealth AC, stock throttle body, S&S manifold, power tune duals, MK45 muffler * Recommended for closed course competition racing

Not Yet Reviewed

$3,359.95

Vertex Race Piston Kits

Vertex Race piston kits consist of piston, rings, wrist pin, and circlips. These pistons are made from the highest quality 2618 aluminum alloy and are perfectly suited to handle the rigors and high pressures of today's modern four-stroke engines. Plus, to aid in the break-in process and reduce wear, every Vertex piston utilizes a unique Molybdenum Disulphide (MOS2) coating on the piston skirt. What truly sets Vertex pistons apart from the competition are the unique piston profiles and compression ratios that are offered in A, B, C, and D sizes. This variation in sizing allows the piston to be perfectly sized to the cylinder for maximizing power and performance, while reducing blow-by and oil consumption. Order the piston kit designed to fit your application needs.

Not Yet Reviewed

$156.70

Summit Bucks

S&S Cycle 865cc Big Bore Kits

S&S Cycle 865cc Big Bore kits are ideal for Royal Enfield 650 Twins. Designed for closed course racing competition, the kits include pistons, rings, pins, and sleeves. The high compression pistons feature a 7cc raised dome to achieve a compression ratio of 11:1 (from 9.5:1). Higher compression is a key factor in increasing performance.

Not Yet Reviewed

$849.95