Engines & Engine Parts

Pro LS 4340 Rotating Assembly, 376 Cid., 4.065 bore, 3.622 stroke, 24X, 6.125 rod, 12cc dish, 9.9:1 @ 65cc, 9.4:1 @ 70cc, File-Fit rings, H Bearings

Part Number: SUM-R2436L06512

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Pro LS 4340 Rotating Assembly, 365 Cid., 4.005 bore, 3.622 stroke, 24X, 6.098 rod,12cc dish, 9.6:1 @ 65cc, 9.2:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R243600512

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Pistons, Forged, Flat Top, 2-Valve Reliefs, 4.030 in. Bore, 3.750 in. Stroke, 5.700 in. Rod, 1.425 in. Compression, Chevy, Set of 8

Part Number: JEP-271055

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Estimated Ship Date: May 11, 2026 if ordered today

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Pistons, Forged, Flat Top, 2-Valve Reliefs, 4.000 in. Bore, 4.000 in. Stroke, 6.125 in. Rod, 1.110 in. Compression, Chevy, Set of 8

Part Number: JEP-361027

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Piston, Forged, Flat Top, 2-Valve Reliefs, 4.125 in. Bore, 3.875 in. Stroke, 6.000 in. Rod, 1.062 in. Compression, Chevy, Each

Part Number: JEP-295445S

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Piston, Forged, Flat Top, 2-Valve Reliefs, 4.060 in. Bore, 3.750 in. Stroke, 6.000 in. Rod, 1.125 in. Compression, Chevy, Each

Part Number: JEP-329424S

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Pro LS 4340 Rotating Assembly, 378 Cid., 4.080 bore, 3.622 stroke, 58x, 6.125 rod, 12cc dish, 9.9:1 @ 65cc, 9.4:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R5836L08012

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Pro LS 4340 Rotating Assembly, 377 Cid., 4.070 bore, 3.622 stroke, 24X, 6.125 rod, 2cc dome, 11.6:1 @ 65cc, 10.9:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R2436L0702

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Pistons, Forged, Flat Top, 2-Valve Reliefs, 4.030 in. Bore, 3.622 in. Stroke, 6.098 in. Rod, 1.330 in. Compression, Chevy, Set of 8

Part Number: JEP-329378

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Piston, Forged, Flat Top, 2-Valve Reliefs, 4.080 in. Bore, 3.622 in. Stroke, 6.098 in. Rod, 1.330 in. Compression, Chevy, Left, Each

Part Number: JEP-298617L

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Piston, Forged, Dome, 2-Valve Reliefs, 4.040 in. Bore, 3.480 in. Stroke, 6.000 in. Rod, 1.260 in. Compression, Chevy, Each

Part Number: JEP-329458S

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Estimated Ship Date: May 8, 2026 if ordered today

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Piston, Forged, Flat Top, 4-Valve Reliefs, 4.020 in. Bore, 3.480 in. Stroke, 5.700 in. Rod, 1.560 in. Compression, Chevy, Each

Part Number: JEP-324865S

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Piston, Forged, Flat Top, 2-Valve Reliefs, 4.070 in. Bore, 3.622 in. Stroke, 6.125 in. Rod, 1.300 in. Compression, Chevy, Right, Each

Part Number: JEP-279593R

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Pro LS 4340 Rotating Assembly, 346 Cid., 3.898 bore, 3.622 stroke, 58x, 6.125 rod, 7cc dish, 9.7:1 @ 65cc, 9.4:1 @ 68cc, File-Fit Rings, H Bearings

Part Number: SUM-R5836L8987

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Pro LS 4340 Rotating Assembly, 371 Cid., 4.040 bore, 3.622 stroke, 58x, 6.098 rod, 12cc dish, 9.8:1 @ 65cc, 9.3:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R583604012

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Pro LS Rotating Assembly, 370 Cid., 4.030 bore, 3.622 stroke, 58x, 6.098 rod, 2cc Flat Top, 10.9:1 @ 65cc, 10.3:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R58360302

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Pro LS 4340 Rotating Assembly, 346 Cid., 3.898 bore, 3.622 stroke, 58x, 6.125 rod, 3cc dome, 11:1 @ 65cc, 10.6:1 @ 68cc, File-Fit Rings, H Bearings

Part Number: SUM-R5836L8983

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Pistons, Forged, Dish, 2-Valve Reliefs, 4.040 in. Bore, 4.000 in. Stroke, 6.200 in. Rod, 1.300 in. Compression, Ford, Set of 8

Part Number: JEP-321408

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Estimated Ship Date: May 11, 2026 if ordered today

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Piston, Forged, Dish, 4-Valve Reliefs, 4.020 in. Bore, 3.750 in. Stroke, 6.000 in. Rod, 1.125 in. Compression, Chevy, Each

Part Number: JEP-324862S

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Piston, Forged, Flat Top, 2-Valve Reliefs, 4.065 in. Bore, 3.622 in. Stroke, 6.125 in. Rod, 1.300 in. Compression, Chevy, Left, Each

Part Number: JEP-361024L

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Piston, Forged, Flat Top, 2-Valve Reliefs, 4.010 in. Bore, 3.622 in. Stroke, 6.125 in. Rod, 1.300 in. Compression, Chevy, Left, Each

Part Number: JEP-329374L

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Piston, Forged, Flat Top, 2-Valve Reliefs, 4.030 in. Bore, 3.480 in. Stroke, 6.000 in. Rod, 1.260 in. Compression, Chevy, Each

Part Number: JEP-367094S

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Piston, Forged, Flat Top, 2-Valve Reliefs, 4.030 in. Bore, 3.480 in. Stroke, 6.250 in. Rod, 1.000 in. Compression, Chevy, Each

Part Number: JEP-271054S

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Piston, Forged, Dish, 2-Valve Reliefs, 3.905 in. Bore, 3.622 in. Stroke, 6.125 in. Rod, 1.294 in. Compression, Chevy, Each

Part Number: JEP-366447S

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Piston, Forged, Dish, 2-Valve Reliefs, 4.030 in. Bore, 4.000 in. Stroke, 6.200 in. Rod, 1.300 in. Compression, Chevy, Right, Each

Part Number: JEP-291056R

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