Reverse Rotation Distributor Gear for Chevy - Fits Pertronix, Maxvolt, MSD, 1/2" Shafts 

These reverse rotation distributor gears fit Chevy V-8's and V-6's, made of ductile iron for strength Resists wear and breakage, even when used with a heavy duty oil pump Fits Pertronix, Maxvolt, MSD and more distributors with .500" shafts.