-
SCA-1-40901 PART NUMBER
Scat 1-40901 SB Chevy 415/421 Competition Rotating Assembly - 11.8:1 CP Flat Top PistonsSpecial Price $2,824.95 Regular Price $2,874.95
Rotating Assembly, Scat 4340 Forged Standard Weight Crankshaft 3.875 Stroke, 350 Main, Scat 6.000 H-Beam Rods, CP Forged -6.8cc Flat Top Pistons, 2-PC Rear Seal
Learn More -
SCA-1-41564 PART NUMBER
Scat 1-41564 SB Chevy 415/421 Competition Rotating Assembly - 11.8:1 CP Flat Top PistonsSpecial Price $2,813.95 Regular Price $2,863.95
Rotating Assembly, Scat 4340 Forged Standard Weight Crankshaft 3.875 Stroke, 400 Main, Scat 6.000 H-Beam Rods, CP Forged -6.8cc Flat Top Pistons, 2-PC Rear Seal
Learn More -
ESP-12032 PART NUMBER
Eagle 12032 SBC 415/421 Pro Competition Rotating Assembly Kit, -5cc Mahle Flat Top PistonsSpecial Price $2,457.95 Regular Price $2,507.95
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 -5cc Flat Top Pistons, 2-PC Rear Seal, Performance Rings and Bearings Included
Learn More -
ESP-12132 PART NUMBER
Eagle 12132 SB Chevy 415/421 Rotating Assembly Kit, -5cc Mahle Flat Top Pistons, 350 MainSpecial Price $2,476.95 Regular Price $2,526.95
SB Chevy 415/421 Stroker Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft 3.875 Stroke, 350 Main, Eagle 6.000 H-Beam Rods, Mahle 4032 Forged -5cc Flat top Pistons, 2-PC Rear Seal, Performance Rings and Bearings Included Learn More -
ESP-35640 PART NUMBER
Eagle 35640 SB Chevy 415/421 Rotating Assembly, 5.6cc JE Dome Pistons, 2-PC Rear SealSpecial Price $2,971.95 Regular Price $3,021.95
Small Block Chevy 415 421 Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft, 3.875 Stroke, 400 Main, Eagle 6.000 H-Beam Rods, JE 2618 Forged +5.6cc Dome Pistons, 2-PC Rear Seal, Performance Rings and Bearings Included Learn More -
ESP-35650 PART NUMBER
Eagle 35650 SB Chevy 415/421 Pro Rotating Assembly, 10.8cc JE Dome Pistons, 2-PC Rear SealSpecial Price $2,971.95 Regular Price $3,021.95
Small Block Chevy 415/421 Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft, 3.875 Stroke, 400 Main, Eagle 6.000 H-Beam Rods, JE 2618 Forged +10.8cc Dome Pistons, 2-PC Rear Seal, Performance Rings and Bearings Included Learn More -
CNC-1249-CS PART NUMBER
CNC SB Chevy 415/421 Compstar Rotating Assembly - 12.0:1 Mahle Flat Top Pistons, Balanced$2,959.95
SB Chevy, Compstar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, Mahle -5cc Flat Top Pistons, 2-PC Seal, Balanced Assembly
Learn More -
CNC-1250-CS PART NUMBER
CNC SB Chevy 415/421 Compstar Rotating Assembly - 13.5:1 Mahle Dome Pistons, Balanced$3,024.95
SB Chevy, Compstar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, Mahle 4cc Dome Pistons, 2-PC Seal, Balanced Assembly
Learn More -
CNC-1251-CS PART NUMBER
CNC SB Chevy 415/421 Compstar Rotating Assembly - 10.0:1 Mahle Dish Pistons, Balanced$3,027.95
SB Chevy, Compstar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, Mahle -22cc Dish Pistons, 2-PC Seal, Balanced Assembly
Learn More -
CNC-1252-CS PART NUMBER
CNC SB Chevy 415/421 Compstar Balanced Rotating Assembly - 13.7:1 JE Dome Pistons, Balanced$3,330.95
SB Chevy, Compstar 4340 Forged Crankshaft 3.875 Stroke, 350 or 400 Main, 6.000 H Beam Rods, JE 5.6cc Dome Pistons, 2-PC Seal, Balanced Assembly
Learn More
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.
Shop By