KB Hypereutectic Flat Top Pistons - SB Chevy 383 - 5.7" Rod Length, .030" Over Bore Size HASZ6BM Alcohol / E85 / Gas

Alcohol / E85 / Gas

3000-3400 lb Car Weight

FS 268HThe COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development

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KB Hypereutectic Flat Top Pistons - SB Chevy 383 - 5.7" Rod Length, .030" Over Bore Size HASZ6BM Alcohol / E85 / GasModern 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