KB Hypereutectic Flat Top Pistons - SB Chevy 383 - 5.7" Rod Length, .030" Over Bore Size BR40015 0FAST is the leading developer

0FAST is the leading developer of electronic fuel injection systems

100-micron stainless steel replacement element

100 psi Regulator Kit

Without exception all BBK Performance parts are direct bolt on with no modifications

KB Hypereutectic Flat Top Pistons - SB Chevy 383 - 5.7" Rod Length, .030" Over Bore Size BR40015 0FAST is the leading developerModern 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