Water Pump Underdrive Pulley
This product is currently out of stock.
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.