BOP Engineering's ultimate Distributor/Oil Pump Drive Gear for the Traditional Pontiac V-8. Crafted from Carbon Ultra-Poly, this gear replaces worn bronze distributor gears and are a must for any roller cam or cast iron cam, especially with higher pressure oil pumps. These gears have 15 years of proven street and track performance and durability may be the last one you ever buy! Never worry about metal shavings in your oil again.
BOP491 fits factory distributors with a .491 shaft.
BOP500 fits aftermarket MSD distributors with a .500 shaft.