KB Hypereutectic Flat Top Pistons - SB Chevy 350 - 5.7" Rod Length, .040" Over Bore Size 60-003 Recommended for all racing applications

Recommended for all racing applications where mufflers are required with a substantial decibel reduction over open headers

Best with 5 speed or 2200-2500 stall

123 in Long

Pins heat treated to the 52 Rockwell hardness scale

Durable and Reliable: Built to withstand the rigors of racing

KB Hypereutectic Flat Top Pistons - SB Chevy 350 - 5.7" Rod Length, .040" Over Bore Size 60-003 Recommended for all racing applicationsModern 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