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CNC-1249-MR PART NUMBER
CNC SB Chevy 415/421 Molnar Rotating Assembly - 12.0:1 Mahle Flat Top Pistons$2,899.95
SB Chevy, Molnar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, Mahle -5cc Flat Top Pistons, 2-PC Seal
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CNC-1250-MR PART NUMBER
CNC SB Chevy 415/421 Molnar Rotating Assembly - 13.5:1 Mahle Dome Pistons$2,999.95
SB Chevy, Molnar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, Mahle 4cc Dome Pistons, 2-PC Seal
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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-1252-MR PART NUMBER
CNC SB Chevy 415/421 Molnar Rotating Assembly - 13.7:1 JE Dome Pistons$3,299.95
SB Chevy, Molnar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, JE 5.6cc Dome Pistons, 2-PC Seal
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CNC-1254-MR PART NUMBER
CNC SB Chevy 415/421 Molnar Rotating Assembly - 14.7:1 JE Hollow Dome GP Pistons$3,599.95
SB Chevy, Molnar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, JE 10.8cc Hollow Dome GP Pistons, 2-PC Seal
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CNC-1256-MR PART NUMBER
CNC SB Chevy 415/421 Molnar Rotating Assembly - 12.0:1 JE Flat Top Pistons$3,250.95
SB Chevy, Molnar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, JE -5cc Flat Top Pistons, 2-PC Seal
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CNC-1261-MR PART NUMBER
CNC SB Chevy 415/421 Molnar Rotating Assembly - 12.0:1 SRP Professional Flat Top Pistons$2,950.95
SB Chevy, Molnar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, SRP Professional -5cc Flat Top 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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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.