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Butler Performance Inc. » Butler Performance
Butler Performance, a name synonymous with High Performance, specifically traditional Pontiac engines.
Browse 421 Blocks (427-489 cu. In.) Products
Items 1-4 of 4
Description:
New Cast or Forged Crank 4.250" Stroke
Choose Desired Bore Size and Ring Type
Custom Butler/Ross Forged -8cc Flat Top, Custom Dome, or Custom Dish Ross Pistons...More Details »
Item #: BPI-4250-325-421
Condition:
New
Custom piston assemblies ship in 10-12 weeks
Price: $2,449.00
Description:
New Cast or Forged Crankshaft 4.210" Stroke
Choose Desired Bore Size and Ring Type
Flat Top, Dome, or Dish Pistons
Specify Desired Compression Ratio...More Details »
Item #: BPI-4210-325-421
Condition:
New
Icon piston assemblies usually ship in 1-2 weeks
Custom piston assemblies ship in 10-12 weeks
Price: $2,595.00
Description:
New Forged Crank 4.500" Stroke
Choose Desired Bore Size and Ring Type
Forged Flat Top Ross Pistons, Dish, or Dome Available
Specify Desired Compression Ratio...More Details »
Item #: BPI-4500-325-421
Condition:
New
Custom piston assemblies ship in 9-10 weeks
Price: $3,149.00
Description:
**Must use 1967 and later or aftermarket 14 degree heads for correct valve pocket angles**
New Cast or Forged Crank 4.250" Stroke
Choose Desired Bore Size and Ring Type...More Details »
Item #: BPI-461-325-421
Condition:
New
Usually ships in 1-2 Weeks
Usually ships in 1-2 Weeks
Price: $2,199.00
Items 1-4 of 4