CNC-Motorsports offers the best selection of 331 stroker 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, K1, JE/SRP, Diamond, Wiseco, Mahle CP and Keith Black to name a few. CNC-Motorsports can customize any 331 stroker kit to meet your specific needs. All balanced 331 rotating assembly kits are completed in house by CNC-Motorsports. If you don’t see the 331 kit you're wanting feel free to call or email our experienced staff today.
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ESP-16006 PART NUMBER
Eagle 16006 SB Ford 331 Street Strip Rotating Assembly, -6cc Mahle Flat Top Pistons$1,485.95
Ford 331 Street Strip Rotating Assembly, Cast Crankshaft 3.250 Stroke, 5.400 I-Beam Rods, Mahle Forged -6cc Flat Top Pistons, 1 or 2-PC Rear Seal, Rings and Bearings Included
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ESP-14006 PART NUMBER
Eagle 14006 Ford 331 Pro Competition Rotating Assembly, -6cc Mahle Flat Top PistonsSpecial Price $2,353.95 Regular Price $2,403.95
SBF 331 Pro Competition Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft 3.250 Stroke, Eagle 5.400 H-Beam Rods, Mahle 4032 Forged -6cc Flat Top Pistons, Fits 1 or 2-PC Rear Seal, Rings and Bearings Included
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ESP-14031 PART NUMBER
Eagle 14031 Ford 331 Pro Competition Rotating Assembly, 6.2cc Mahle Flat Top Pistons, Fit Twisted Wedge HeadsSpecial Price $2,353.95 Regular Price $2,403.95
Eagle SBF 331 Pro Competition Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft 3.250 Stroke, Eagle 5.400 H-Beam Rods, Mahle 4032 Forged -6cc Flat Top Pistons, Fits 1 or 2-PC Rear Seal, Rings and Bearings Included *Pistons Fits Trick Flow Twisted Wedge Cylinder Heads*
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SCA-1-94055 PART NUMBER
Scat 1-94055 SB Ford 331 Street And Strip Performance Rotating Assembly - 9.8:1 Icon Flat Top Pistons$1,644.95
SB Ford 331, Scat 9000 Cast Steel Crankshaft 3.250 Stroke, Scat 5.400 I-Beam Rods, Icon Forged -11cc Flat Top Pistons
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SCA-1-94060 PART NUMBER
Scat 1-94060 SB Ford 331 Street And Strip Performance Rotating Assembly - 10.4:1 Mahle Flat Top Pistons$1,599.95
SB Ford 331, Scat 9000 Cast Steel Crankshaft 3.250 Stroke, Scat 5.400 I-Beam Rods, Mahle Forged -6cc Flat Top Pistons
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SCA-1-45155 PART NUMBER
Scat 1-45155 SB Ford 331 Street And Strip Performance Rotating Assembly - 9.1:1 Icon Flat Top PistonsSpecial Price $2,370.95 Regular Price $2,420.95
SB Ford 331, Rotating Assembly, Scat 4340 Forged Steel Crankshaft 3.250 Stroke, Scat 5.400 I-Beam Rods, Icon Forged -11cc Flat Top Pistons
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SCA-1-45160 PART NUMBER
Scat 1-45160 SB Ford 331 Competition Rotating Assembly - 9.6:1 Mahle Flat PistonsSpecial Price $2,486.95 Regular Price $2,536.95
SB Ford 331, Rotating Assembly, Scat 4340 Forged Steel Crankshaft 3.250 Stroke, Scat 5.400 H-Beam Rods, Mahle Forged -6cc Flat Top Pistons
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CNC-3310-TFS PART NUMBER
Eagle SB Ford 331 Competition Rotating Assembly, 10.2:1 SRP Pistons, Fits TFS HeadsSpecial Price $2,249.95 Regular Price $2,299.95
SB Ford 302/331 Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft 3.250 Stroke, Eagle 5.400 H-Beam Rods, SRP 4032 Forged -5cc Flat Top Pistons, Fits 1 or 2-PC Rear Seal, Rings and Bearings Included, Pistons fit Trick Flow Twisted Wedge Heads
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CNC-3312-SRP PART NUMBER
Eagle SB Ford 331 Competition Rotating Assembly, 10.4:1 SRP PistonsSpecial Price $2,300.95 Regular Price $2,350.95
SB Ford 302/331 Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft 3.250 Stroke, Eagle 5.400 H-Beam Rods, SRP 4032 Forged -5cc Flat Top Pistons, Fits 1 or 2-PC Rear Seal, Rings and Bearings Included, Fits stock and most aftermarket 20 degree inline valve heads
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ESP-64031 PART NUMBER
Eagle 64031 SB Ford 331 Pro Street Rotating Assembly, -6.2cc Mahle Flat Top PistonsSpecial Price $2,229.95 Regular Price $2,279.95
Small Block Ford 331 Pro Street Rotating Assembly Kit, Eagle 4340 Forged Steel Crankshaft 3.250 Stroke, Eagle 5.400 I-Beam Rods, 4032 Mahle -6.2cc Twisted Wedge Flat Top Pistons, Fits 1 or 2-PC Rear Seal, Rings and Bearings Included
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