CNC-Motorsports offers the best selection of Small Block Chevy 415-421 rotating assembly kits. We offer street kits with pump gas pistons to wild fully forged rotating assembly kits to meet your racing needs. We offer quality name brands such as; Eagle, Scat, Callies, Compstar, Crower, Lunati, JE/SRP, Diamond, Wiseco, Mahle CP and Keith Black to name a few. CNC-Motorsports can customize any stroker kit to meet your specific needs. All balanced rotating assembly kits are completed in house by CNC-Motorsports. If you don’t see the stroker kit you're wanting feel free to call or email our experienced staff today.
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ESP-12147 PART NUMBER
Eagle 12147 SBC 415/421 Pro Rotating Assembly Kit, -22cc Mahle Dish Pistons, 2-PC Rear SealSpecial Price $2,540.95 Regular Price $2,590.95
SB Chevy 415/421 Stroker Pro Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft 3.875 Stroke, 400 Main, Eagle 6.000 H-Beam Rods, Mahle 4032 Forged -22cc Dish Pistons, 2-PC Rear Seal, Performance Rings and Bearings Included
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CNC-1264-MR PART NUMBER
SB Chevy 415/421 Molnar Rotating Assembly, Balanced - 8.5:1 Diamond Race Dish Pistons$3,550.95
SB Chevy, Molnar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, Diamond -38cc Race Dish Pistons, 2-PC Seal, Balanced
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CNC-1251-MR PART NUMBER
CNC SB Chevy 415/421 Molnar Rotating Assembly - 10.0:1 Mahle Dish Pistons$2,999.95
SB Chevy, Molnar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, Mahle -22cc Dish Pistons, 2-PC Seal
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CNC-1262-MR PART NUMBER
CNC SB Chevy 415/421 Molnar Rotating Assembly - 10.6:1 SRP Professional Dish Pistons$3,050.95
SB Chevy, Molnar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, SRP Professional -16cc Dish Pistons, 2-PC Seal
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