12 Rib Crank Pulley - Camaro / CTS-V / CT5-V - LT1 / LT4

The TooHighPsi Camaro/CTSV/CT5-V Blackwing 12 Rib Crank Pulleys are designed to work with an ATI Super Damper harmonic balancer and are the perfect companion for our REAPER 12 rib Supercharger Belt Drives! 

These precisely engineered overdrive crank pulleys are made for a 6 bolt mounting and feature 12 ribs (3 ribs forward and 1 rib back of the OE 8 rib pulleys) with a hard-coat anodized surface for long lasting performance.  Available in 10.00", 10.32" and 10.45" sizes. 

The THP Sway Bar Fit Kit is required for cars that retain the factory sway bar and use a lower pulley greater than 9.24" (+15%). Under certain condition, such as full suspension travel, it is possible for the pulley to rub the sway bar. Our Sway Bar Fit Kit provides the necessary spacers and hardware to reposition the sway bar to eliminate contact with the lower pulley.

Installation Notes: 

1. Pulleys will not mount to stock crankshaft pulley, they require the ATI damper #918856 for fitment.
   
2. We recommend using all 6 bolt locations when mounting the 12 rib pulleys to the ATI damper. Use the optional THP Drill Jig Kit if extra holes need drilling in the damper shell. The damper hub is already re-drilled and tapped for 6 bolts.