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• Vacuum heat treated for superior strength
Locking Collar Sold Separately
• Thru hardened to Rc 45-48 to maximize the material’s torsional strength
91″ in length (Measured from outside face of flange to axle tip)
Housing width
Ford 9″ 4.57 Pro Gear with 35 Spline Pinion US/Strange Gear – Produced in USA SBC • Vacuum heat treated forFord 9" 4. 57 US Strange Pro Gear with 35 spline pinion Part Number: RP07990457US Designed For Drag Racing Only Pro Gears may be necessary when tooth breakage occurs with Standard gear sets Produced from a softer material, the teeth can flex as opposed to crack and break The life expectancy can vary anywhere from 15 to 300 runs depending on the vehicle If a Standard gear provided acceptable life, a Pro gear may not be the right choice Machined From