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Engines & Engine Parts
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched...
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your...
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your daily driver.
Pro LS 4340 Rotating Assembly, 408 Cid., 4.030 bore, 4.000 stroke, 24X, 6.125 rod, 8cc dish, 11.1:1 @ 65cc, 10.6:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R24400308
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
BUILD IT WITH SUMMIT!
Pro LS 4340 Rotating Assembly, 408 Cid., 4.030 bore, 4.000 stroke, 24X, 6.125 rod, 20cc dish, 9.8:1 @ 65cc, 9.4:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R244003020
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 415 Cid., 4.065 bore, 4.000 stroke, 58x, 6.125 rod, 6cc dish, 11.5:1 @ 65cc, 10.9:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R58400656
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 383 Cid., 3.903 bore, 4.000 stroke, 24X, 6.125 rod, 5cc dish, 10.9:1 @ 65cc, 10.6:1 @ 68cc, File-Fit Rings, H Bearings
Part Number: SUM-R24409035
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 408 Cid., 4.030 bore, 4.000 stroke, 58x, 6.125 rod, 8cc dish, 11.1:1 @ 65cc, 10.6:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R58400308
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 408 Cid., 4.030 bore, 4.000 stroke, 58x, 6.125 rod, 20cc dish, 9.8:1 @ 65cc, 9.4:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R584003020
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 416 Cid., 4.070 bore, 4.000 stroke, 58x, 6.125 rod, 21cc dish, 9.9:1 @ 65cc, 9.5:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R584007021
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 416 Cid., 4.070 bore, 4.000 stroke, 58x, 6.125 rod, 6cc dish, 11.5:1 @ 65cc, 10.9:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R58400706
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 402 Cid., 4.000 bore, 4.000 stroke, 24X, 6.125 rod, 8cc dish, 11:1 @ 65cc, 10.4:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R24400008
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS Rotating Assembly, 325 Cid., 3.780 bore, Standard 3.622 stroke, 24X, 6.125 rod, 7cc dish, 9.7:1 @ 61cc, 9.3:1 @ 65cc, File-Fit Rings, H Bearing
Part Number: SUM-R2436L7807
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 415 Cid., 4.065 bore, 4.000 stroke, 24X, 6.125 rod, 6cc dish, 11.5:1 @ 65cc, 10.9:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R24400656
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS Rotating Assembly, 330 Cid., 3.810 bore, Standard 3.622 stroke, 24X, 6.125 rod, 7cc dish, 9.8:1 @ 61cc, 9.4:1 @ 65cc, File-Fit Rings, H Bearing
Part Number: SUM-R2436L8107
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 403 Cid., 4.005 bore, 4.000 stroke, 24X, 6.125 rod, 8cc dish, 11:1 @ 65cc, 10.4:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R24400058
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 415 Cid., 4.065 bore, 4.000 stroke, 58x, 6.125 rod, 21cc dish, 9.9:1 @ 65cc, 9.5:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R584006521
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS Rotating Assembly, 325 Cid., 3.780 bore, Standard 3.622 stroke, 24X, 6.098 rod, 7cc dish, 9.7:1 @ 61cc, 9.3:1 @ 65cc, File-Fit Rings, H Bearing
Part Number: SUM-R24367807
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 370 Cid., 4.030 bore, 3.622 stroke, 24X, 6.098 rod, 12cc dish, 9.7:1 @ 65cc, 9.3:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R243603012
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 403 Cid., 4.005 bore, 4.000 stroke, 58x, 6.125 rod, 8cc dish, 11:1 @ 65cc, 10.4:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R58400058
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS Rotating Assembly, 365 Cid., 4.005 bore, 3.622 stroke, 58x, 6.098 rod, 2cc Flat Top, 10.8:1 @ 65cc, 10.2:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R58360052
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS Rotating Assembly, 330 Cid., 3.810 bore, Standard 3.622 stroke, 24X, 6.125 rod, 2cc dome, 11:1 @ 61cc, 10.4:1 @ 65cc, File-Fit Rings, H Bearing
Part Number: SUM-R2436L8102
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 416 Cid., 4.070 bore, 4.000 stroke, 24X, 6.125 rod, 6cc dish, 11.5:1 @ 65cc, 10.9:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R24400706
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 360 Cid., 3.785 bore, 4.000 stroke, 24X, 6.125 rod, 5cc dish, 10.9:1 @ 61cc, 10.4:1 @ 65cc, File-Fit Rings, H Bearings
Part Number: SUM-R24407855
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS Rotating Assembly, 364 Cid., 4.000 bore, 3.622 stroke, 24X, 6.098 rod, 2cc Flat Top, 10.7:1 @ 65cc, 10.4:1 @ 70cc File-Fit Rings, H Bearings
Part Number: SUM-R24360002
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 377 Cid., 4.075 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-R5836L07512
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS 4340 Rotating Assembly, 417 Cid., 4.075 bore, 4.000 stroke, 58x, 6.125 rod, 21cc dish, 9.9:1 @ 65cc, 9.5:1 @ 70cc, File-Fit Rings, H Bearings
Part Number: SUM-R584007521
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Pro LS Crank and Rods, Forged 4340 Steel Crank, 4 in. Stroke, Forged 4340 Steel H-Beam Rods, 6.125 in. Rod Length, Chevy, LS, Kit
Part Number: SUM-CR4024125
Estimated Ship Date: Today
Estimated Ship Date: Today
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