Drag Race Use Only Requires Specific Aftermarket Components Case – Designed to utilize 9 1/2″ gear sets Pinion Support – Ability to use 35 spline pinion gear Housing – Additional clearance provided for 9 1/2″ ring gears Will Not Fit OEM Cases or Housings! 9 1/2″ Pro Gears will provide much longer gear life in comparison to 9″ Pro Gears Life expectancy can increase by up to three times depending on the vehicle The exception is when there is violent tire shake and the vehicle is kept under power. The ring gear is manufactured to 9 1/2″ specifications before the OD is reduced to 9.25″ Resulting in a much stronger tooth design than possible with 9″ Pro Gears. Machined From 9310 Forged Steel Heat Treated to Optimize Material Properties Matched Ring & Pinion Set Ring Gear – 9.25″ actual OD – Tooth count 32 – 10 bolt holes in each bolt size – 7/16″-20 RH threads & 1/2″-20 RH threads Pinion – 35 spline shaft – Tooth count 7 – 1″-14 RH threads |