Water Pump Underdrive Pulley

Water Pump Underdrive Pulley

Regular price $69.99
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Dyno testing our 5.5" underdrive pulley on a near stock L36 showed 3WHP gained at 6k rpm. In car testing shows only a 2 deg increase in operating temps over stock. Higher gains are possible depending on your engine combination. Pulleys are available in a high gloss black anodized finish.

  • 8% underdriven
  • dyno proven horsepower
  • lightweight design saves a pound of rotating mass
  • increases water pump life expectancy
  • better fuel economy

One size larger than stock belt recommended.

Does NOT fit HBody cars because of their front engine mount. Bonneville, Park Ave, & LaSabre.


Water pump pulley: 115 in/lbs.

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