Ultra High Performance Series Ring & Pinion for GM 10 Bolt 8.5" / 8.625" Axle. These gear sets are a true 8.625" face-hob cut, made of the purest 8620 steel, lapped to perfection for an easy set-up, quiet operation and maximum endurance for abuse. Perfect for anything from off road racing to street performance, or simply replacing an old worn out gear set.
