Shown above is our NEW special bolt kit for attaching our BILLET ALUMINUM lower (crankshaft) pulleys to the damper. These are a unique application, since our billet aluminum pulleys are thicker than a standard stamped steel pulley, so the bolt must be made longer to ensure it will have full thread engagement into the damper. These slightly longer bolts ensure the pulley will be attached perfectly. And the recessed Allen head drive looks great and makes them easy to install and remove with the engine in the car. Package includes six bolts.