Ford 9" Street Diff Gear 4.11 :1 28 Spline Ring & Pinion

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 and various gear ratios to suit a variety of applications.