RTS Billet aluminum pinion supports are completely CNC-machined. The aluminum support offers the best of both worlds by featuring superior oiling channels for extending bearing life, lightweight Billet aluminum construction and the rigidity to withstand the most demanding of applications.This new heavy duty pinion support has adopted the 9 inch Daytona style approach by using both larger front and rear bearing for more sturdy pinion alignment. The weak link in the Ford 8 inch diff is that the pinion screws itself out the front of the casing under load. This new superior pinion support comes with a stud kit to give you a huge strength upgrade before stepping up to a 9 inch. Check out our new matching Chromoly Yoke RTS-U1602