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Brand: Sonnax

Type: Servo

Interchange Part Number: 103909K

Items Included: Servo Cover, Cover Gasket, Cover O-ring, Bolts, Pipe Plug

Manufacturer Part Number: 28821-03K

Material: Aluminum

Vintage Part: No

Universal Fitment: Yes

Performance Part: Yes

Powerglide

Servo Cover Kit
Part No. 28821-03K

Purple anodized

GM Powerglides used for drag racing generate higher line pressure than the OE servo piston can withstand. At pressures over 200 psi, the OE piston can crack, resulting in transmission failure. Sonnax servo cover kit 28821-03K works with Sonnax piston kits 28821-01K or 28821-02K to improve transmission performance and durability under high-pressure conditions.
  • Lightweight, billet aluminum cover replaces heavy, cast-iron OE cover
  • Easy to install, no case modifications required

  • Cover O-Ring
  • Cover Purple Anodized
  • Pipe Plug
  • Hex Head Bolts (3)
  • Cover Gasket

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