Engine Rotating Assembly
An engine rotating assembly refers to the collection of components within an engine that are responsible for converting the reciprocating motion of the pistons into rotational motion. It typically includes the crankshaft, connecting rods, pistons, piston rings, and wrist pins. The crankshaft converts the up-and-down motion of the pistons into rotational motion, while the connecting rods transfer this motion from the pistons to the crankshaft. The pistons, piston rings, and wrist pins work together to create a sealed combustion chamber and facilitate efficient power generation. The engine rotating assembly is a critical part of the engine's internal components and plays a key role in its overall performance and durability.
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Selecting the correct engine rotating assembly requires careful consideration of several factors. Firstly, you need to determine the specific engine configuration, such as the engine displacement, cylinder bore size, and stroke length. For example, if you have a Chevy small-block engine with a 302 cubic inch displacement, you would need a Chevy 302 rotating assembly or an SBC 302 rotating assembly specifically designed for that engine. It is essential to match the rotating assembly components to the specific engine specifications to ensure proper fitment, balance, and compatibility. Additionally, consider the intended use of the engine, such as street performance or racing applications, as this will impact the selection of components like pistons and rods.
JEGS offers a wide range of engine rotating assemblies to meet the needs of automotive enthusiasts and racers. Our selection includes Chevy 302 rotating assemblies and SBC 302 rotating assemblies designed specifically for small-block Chevy engines with a 302 cubic inch displacement. These rotating assemblies are meticulously engineered and manufactured to provide excellent performance and durability. We offer options with different piston types, rod lengths, and crankshaft configurations to suit various applications and performance goals. With JEGS, you can trust that you are getting top-quality engine rotating assemblies that will help you build a reliable and high-performing engine. Explore our selection today to find the perfect rotating assembly for your engine build.
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Eagle B16622MS030
Eagle Ford 289/302 Manual Transmission Street and Strip Rotating Assembly [157-Tooth Flywheel]
Street and Strip Rotating Assembly
Stroke: 3.400
Disp. @ 4.030: 347
Rod Length: 5.400
Pistons: -5cc Flat Top
Rings: File Fit
Comp. Ratio 58cc/64cc: 10.7/10.0
Rod Journals: 2.123 in.
Stroke: 3.400
Disp. @ 4.030: 347
Rod Length: 5.400
Pistons: -5cc Flat Top
Rings: File Fit
Comp. Ratio 58cc/64cc: 10.7/10.0
Rod Journals: 2.123 in.
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$1,819.99
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Ford 302 Series 9000 Cast Street/Strip Rotating Assembly 347ci 4.030'' Bore Hypereutectic Flat Top Piston 11.0:1 w/54cc; 10.0:1 w/58cc; 9.6:1 w/64cc 3.400'' Crank Stroke 5.400'' Rod Length External Balanced Assembly
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$1,944.99
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Eagle B15404L03053
Eagle Small Block Chevy Street & Strip Rotating Assembly [383 ci, 1 Piece Rear Main Seal]
Small Block Chevy Street & Strip Rotating AssemblyDisplacement: 383 ci Bore: 4.030 in. Stroke: 3.750 in. Connecting Rod Length: 5.700 in. -12cc Dished Pistons Externally BalancedIncludes:
- Flexplate
- Balancer
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$1,129.99
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Eagle B13202E000
Eagle Street & Strip Rotating Assembly [Small Block Chevy 350 2-Piece Rear Main Seal]
Street & Strip Rotating AssemblyChevy Small Block 2-pc Rear Seal, 350 Main Size Crankshaft: 3.480 in. Stroke, Cast Pistons: 4 in. Bore, Hypereutectic -7 cc Flat Top Rods: 5.700 in. Length, 5140 I-Beams Balanced
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$1,274.99
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Eagle B16022MA030
Eagle Eagle Ford 289/302 Automatic Transmission Street and Strip Rotating Assemblies
Street and Strip Rotating Assembly
Stroke: 3.400
Disp. @ 4.030: 347
Rod Length: 5.400
Pistons: -6.5cc Flat Top
Rings: File Fit
Comp. Ratio 58cc/64cc: 10.3/9.7
Stroke: 3.400
Disp. @ 4.030: 347
Rod Length: 5.400
Pistons: -6.5cc Flat Top
Rings: File Fit
Comp. Ratio 58cc/64cc: 10.3/9.7
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$1,689.99
Estimated to ship direct from manufacturer on 09/01/25, pending manufacturer availability.
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Chevy 454 4340 Forged Std Weight Competition Rotating Assembly489ci 4.280'' Bore Premium Forged Dome Piston 10.6:1 w/112cc; 10.1:1 w/118cc; 9.6:1 w/124cc 4.250'' Crank Stroke 6.385'' Rod Length Unbalanced Assembly
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$2,839.99
Estimated to ship direct from manufacturer on 07/07/25, pending manufacturer availability.
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Ford FE 390 Series 9000 Cast Street/Strip Rotating Assembly431ci 4.080'' Bore Premium Forged Flat Top Piston 11.0:1 w/72cc; 10.7:1 w/76cc 4.125'' Crank Stroke 6.700'' Rod Length Internal Balanced Assembly
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$2,649.99
Estimated to ship direct from manufacturer on 07/04/25, pending manufacturer availability.
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Chrysler 360 Series 9000 Cast Street/Strip Rotating Assembly408ci 4.030'' Bore Forged Flat Top Piston 12.1:1 w/62cc; 11.3:1 w/68cc; 10.8:1 w/70cc 4.000'' Crank Stroke 6.123'' Rod Length Unbalanced Assembly
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$1,819.99
Estimated to ship direct from manufacturer on 07/09/25, pending manufacturer availability.
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Eagle B13005L06053
Eagle Eagle Chevy Small Block 1pc Seal Balanced Street and Strip Rotating Assemblies
Street and Strip Rotating Assembly -
350 1pc External
Stroke: 3.750
Disp. @ .060: 388
Rod Length: 5.700
Pistons: -7cc Flat Top
Rings: Standard
Comp. Ratio 58cc/64cc: 11.7/10.9
350 1pc External
Stroke: 3.750
Disp. @ .060: 388
Rod Length: 5.700
Pistons: -7cc Flat Top
Rings: Standard
Comp. Ratio 58cc/64cc: 11.7/10.9
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$1,299.99
Estimated to ship direct from manufacturer on 07/10/25, pending manufacturer availability.
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Eagle B13202E030
Eagle B13202E030 Chevy Small Block 2pc Seal Balanced Street and Strip Rotating Assembly
Street and Strip Rotating Assembly
350 2pc Internal
Stroke: 3.480
Disp. @ .030: 355
Rod Length: 5.700
Pistons: -7cc Flat Top
Rings: Standard
Comp. Ratio 58cc/64cc: 10.9/10.2
350 2pc Internal
Stroke: 3.480
Disp. @ .030: 355
Rod Length: 5.700
Pistons: -7cc Flat Top
Rings: Standard
Comp. Ratio 58cc/64cc: 10.9/10.2
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$1,134.99
(1)
Estimated to ship direct from manufacturer on 07/01/25, pending manufacturer availability.
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$1,139.99
Estimated to ship direct from manufacturer on 06/23/25, pending manufacturer availability.
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Street Performance Rotating AssemblyStroke: 3.750 Disp. @ .030: 383 Rod Length: 5.700 Pistons: -5cc Flat Top Rings: Standard Gap Comp. Ratio 58cc/64cc/76cc: 11.4/10.7/9.4
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$1,344.99
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Chrysler 440 4340 Forged Std Weight Competition Rotating Assembly493ci 4.350'' Bore Icon Forged Flat Top Piston, -4.5cc 12.6:1 w/76cc; 11.7:1 w/78cc; 10.6:1 w/88cc 4.150'' Crank Stroke 6.760'' Rod Length Unbalanced Assembly
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$3,109.99
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Eagle B15454E030
Eagle Small Block Chevy Street & Strip Rotating Assembly [383 ci, 2 Piece Rear Main Seal]
Small Block Chevy Street & Strip Rotating AssemblyDisplacement: 383 ci Bore: 4.030 in. Stroke: 3.750 in. Connecting Rod Length: 5.700 in. -12cc Dished Pistons Internally Balanced
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$1,199.99
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Ford 351 Series 9000 Cast Street/Strip Rotating Assembly408ci 4.030 in. Bore Forged Flat Top Piston 4.000 in. Crank Stroke 6.200 in. Rod Length Unbalanced Assembly
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$1,892.99
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Eagle B15405E060
Eagle Small Block Chevy Street & Strip Rotating Assembly [388 ci, 2 Piece Rear Main Seal]
Small Block Chevy Street & Strip Rotating AssemblyDisplacement: 388 ci Bore: 4.060 in. Stroke: 3.750 in. Connecting Rod Length: 5.700 in. -5cc Flat Top Pistons Externally BalancedIncludes:
- Flexplate
- Balancer
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$1,344.99
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Chevy 350 4340 Forged Std Weight Competition Rotating Assembly395ci 4.030'' Bore CP Forged Flat Top Piston, -6.8cc 12.1:1 w/58cc; 11.2:1 w/64cc; 9.9:1 w/76cc 3.875'' Crank Stroke 6.000'' Rod Length Internal Balanced Assembly
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$3,086.99
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Ford 302 Series 9000 Cast Street/Strip Rotating Assembly331ci 4.030'' Bore Forged Flat Top Piston 10.2:1 w/54cc; 9.8:1 w/58cc; 9.1:1 w/64cc 3.250'' Crank Stroke 5.400'' Rod Length External Balanced Assembly
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$2,429.99
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Eagle B15402L04053
Eagle Small Block Chevy Street & Strip Rotating Assembly [357 ci, 1 Piece Rear Main Seal]
Small Block Chevy Street & Strip Rotating AssemblyDisplacement: 357 ci Bore: 4.040 in. Stroke: 3.480 in. Connecting Rod Length: 5.700 in. -7cc Flat Top Pistons Balanced Assembly External Balanced Includes 153 Tooth Flexplate
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$1,034.99
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Eagle B15405L03068
Eagle Small Block Chevy Street & Strip Rotating Assembly [383 ci, 1 Piece Rear Main Seal]
Small Block Chevy Street & Strip Rotating AssemblyDisplacement: 383 ci Bore: 4.030 in. Stroke: 3.750 in. Connecting Rod Length: 5.700 in. -5cc Flat Top Pistons Externally BalancedIncludes:
- Flexplate
- Balancer
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$1,279.99
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Eagle B15402E060
Eagle Small Block Chevy Street & Strip Rotating Assembly [360 ci, 2 Piece Rear Main Seal]
Small Block Chevy Street & Strip Rotating AssemblyDisplacement: 360 ci Bore: 4.060 in. Stroke: 3.480 in. Connecting Rod Length: 5.700 in. -7cc Flat Top Pistons Balanced Assembly Internally Balanced
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$999.99
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Eagle B15455E030
Eagle Small Block Chevy Street & Strip Rotating Assembly [383 ci, 2 Piece Rear Main Seal]
Small Block Chevy Street & Strip Rotating AssemblyDisplacement: 383 ci Bore: 4.030 in. Stroke: 3.750 in. Connecting Rod Length: 5.700 in. -5cc Flat Top Pistons Internally Balanced
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$1,199.99
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Eagle B15404E030
Eagle Small Block Chevy Street & Strip Rotating Assembly [383 ci, 2 Piece Rear Main Seal]
Small Block Chevy Street & Strip Rotating AssemblyDisplacement: 383 ci Bore: 4.030 in. Stroke: 3.750 in. Connecting Rod Length: 5.700 in. -12cc Dished Pistons Externally BalancedIncludes:
- Flexplate
- Balancer
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$1,344.99
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Competition Rotating AssemblyChevy/GM LS3 Engine 429 ci. (4.070 in. Bore x 4.125 in. Stroke) Forged 4340 Crank H-Beam 6.125 in. Forged Rods -5.8 cc Forged Flat Tops Plasma-Moly File Fit Rings King XP Rod/Main Bearings Unbalanced
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$2,869.99
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Scat 1-92300BIE
Scat Chevy Street Performance Stock Replacement Rotating Assembly Stock Replacement Cast Crank I-Beam Rod
Chevy Street Performance Stock Replacement Rotating Assembly Stock Replacement Cast Crank I-Beam Rods Pistons Rings Rod and Main Bearings and Flexplate
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$1,572.99
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Ford 302 Series 9000 Cast Street/Strip Rotating Assembly331ci 4.030'' Bore Forged Flat Top Piston 10.2:1 w/54cc; 9.8:1 w/58cc; 9.1:1 w/64cc 3.250'' Crank Stroke 5.400'' Rod Length Unbalanced Assembly
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$1,824.99
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Speedmaster PCE290115902
Speedmaster PCE290.1159.02 Forged Rotating Assembly Kit Chevy LS3, 4.070" Stroke
$1,900.00
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Ford FE 390 Series 9000 Cast Street/Strip Rotating Assembly431ci 4.080'' Bore Premium Forged Dish Piston 9.3:1 w/72cc; 9.0:1 w/76cc 4.125'' Crank Stroke 6.700'' Rod Length Unbalanced Assembly
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$2,266.99
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Eagle 158024270
Eagle Street & Strip Rotating Assembly for Ford FE 427 Blocks [487 ci Displacement ]
Street & Strip Rotating AssemblyFord FE 427 Crankshaft: 4.250 in. Stroke, Cast Steel Pistons: 4.270 in. Bore, Forged 4032 -20 cc Dish Rods: 6.700 in. Length, Forged 5140 H-Beams File Fit Rings Unbalanced
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$2,049.99
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Street and Strip Rotating Assembly
Stroke: 3.750
Disp. @ .030: 406
Rod Length: 5.700
Pistons: -7cc Flat Top
Rings: Standard
Comp. Ratio 58cc/64cc/76cc: 11.7/11.0/9.7
Stroke: 3.750
Disp. @ .030: 406
Rod Length: 5.700
Pistons: -7cc Flat Top
Rings: Standard
Comp. Ratio 58cc/64cc/76cc: 11.7/11.0/9.7
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$1,264.99
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