12 Rib Crank Pulley - C7 Corvette / Z06 - LT1 / LT4

Maximize performance and efficiency with our precisely engineered TooHighPsi 12 Rib C7 Corvette Crank Pulleys . Designed to work with an ATI Super Damper harmonic balancer, THP 12 rib pulleys are the perfect companion for our REAPER 12 rib Supercharger Belt Drives! 

These precisely engineered overdrive crank pulleys 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.  Currently available as a 9.88" (+23%) with additional sizes being released soon.

Notes:

1. For DRY SUMP vehicles only.
2. Will not mount to stock crankshaft pulley, requires ATI damper #917315 for fitment.
3. Use of the 12 rib 9.88" pulley on the C7 platform will require a small modification to the chassis cross member per the Installation Instructions

Too High PSI shipping & returns

• Processing: please allow 2-3 business days. Custom items (lids, valve covers) need an extra 7-10 business days.
• Returns: new, unused and uninstalled parts in their original packaging with all components, requested within 30 days of purchase. A return authorization (RMA) is required before shipping anything back.
• Not returnable: used, installed or damaged parts, items without original packaging or missing components, and custom or special-order parts.
• Fees: 15% restocking fee on eligible returns; outbound shipping is non-refundable and return shipping is paid by the customer. Orders cancelled before shipment carry a 3% processing fee.

To start a return or ask a question, contact us with your order number.