10 Rib Camaro/CTSV - LT1/LT4 Crank Pulley (+15% or +28%)

The THP Engineering Camaro/CTSV lower pulleys are designed to work with an ATI Super Damper harmonic balancer and are the perfect companion for our LT1/LT4 10 rib Supercharger Belt Drive System! 

These precisely engineered overdrive crank pulleys feature 10 ribs (additional 2 ribs forward) with a Hard-Coat Anodized surface for long lasting performance.  Available in 2 sizes, +15% (9.24") and +28% (10.35"). 

The +28% pulley requires the optional Pulley Fit Kit for cars that retain the factory sway bar. Under certain condition, such as full suspension travel, it is possible for the +28" pulley to rub the sway bar. Our Pulley Fit Kit provides the necessary spacers and hardware to reposition the sway bar to eliminate contact with the lower pulley.

Note: Pulleys will not mount to stock crankshaft pulley, they require ATI damper #918856 for fitment.