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
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dyno proven horsepower
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lightweight design saves a pound of rotating mass
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increases water pump life expectancy
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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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