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Sonnax Race-Calibrated Servo Return Spring Kit 28133-HD

Product Description For Sonnax Parts
Product Part No: -- 28133-HD
Transmissions: -- Powerglide
Package and Weight
Package Quantity: -- 1 ea
Shipping Weight: -- 2.00 lbs
Sonnax:High Performance Part
Base Price:
Product Description
Part Information:
  • { Watch the video } to see exactly how an OE servo performs at high pressures when fitted with an OE, light aftermarket or Sonnax race-calibrated spring:
  • Counteracts pin bias effect up to 275 psi:
  • Includes two .050” shims to aid in tuning at higher line pressures:
  • Works with both OE and aftermarket servo pistons:
  • Also available in Sonnax servo kit 28821-20K:
Part Contents
  1. Shims (2):
  2. Spring:
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