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Servo Piston
Part No. 28821-02

OE Part No. 3846173

Sonnax servo piston 28821-02 for GM Powerglide units features a dual-seal design and can be used with one or two PTFE or OEM-style cast seals.

  • High-strength billet aluminum piston
  • Piston features a rounded profile for better stress distribution
  • 28821 02k