Ford 9" Street Diff Gear 4.11 :1 28 Spline Ring & Pinion RB30 This is a genuine Bosch

This is a genuine Bosch module

Feature's The Centerforce Dual Friction ® Clutch Series uses patented technologies for an ultimate pressure plate and disc combination

Part Number : RTS-A1037-KIT

It suits the "Small Bearing" water pump

Part Number: AF2851-3981

Ford 9" Street Diff Gear 4.11 :1 28 Spline Ring & Pinion RB30 This is a genuine BoschPart Number: AF5076 0411 street Aeroflow performance ring and pinion ford 9" differential gears are strong but quiet performers. Manufactured from 8620 grade steel to handle some of the harshest conditions. Designed with a gear tooth surface finish which reduces both friction & heat for long races & high torque conditions. We use high grade steel in both the ring & pinion gears, with fitment designed to oem specs. We offer these in a 28 spline pinion