KB Hypereutectic SB Chevy Dished Piston Set - 4.155" Bore - 3.750" Stroke - 5.700" Rod Length Eaton Torque Control 1966-1972 Chevrolet Bel Air

1966-1972 Chevrolet Bel Air

Best when used with better heads

Helps Eliminate Downshifting While Towing

1988-1996 Ford F-350

KB Hypereutectic SB Chevy Dished Piston Set - 4.155" Bore - 3.750" Stroke - 5.700" Rod Length Eaton Torque Control 1966-1972 Chevrolet Bel AirModern piston design locates the top ring higher for improved performance. a high top ring operates at higher temperatures and requires a larger top ring end gap. To find the proper ring end gap, multiply your bore size by the ring end gap factor listed on the chart (i. e. , Street Normally Aspirated 4. 000" bore x . 0065" gap factor = . 026" total top ring end gap). Your hypereutectic performance piston will expand less than typical cast or forged