Powerglide

High Clutch Drum Piston
Part No. 28765-09

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Sonnax high clutch piston 28765-09 is a replacement optimized for GM Powerglide performance applications using a stock-style high clutch drum. The piston is thinner than OE pistons to allow for seven or eight frictions depending on friction/steel combination. Forged from 6061 aluminum, the piston will not crack at high operating pressure like cast pistons.

  • Powerglide High Clutch Drum Piston 28765-09