Ford Racing ring and pinion sets are engineered, manufactured, and tested for maximum performance. These ring and pinion sets are finished in a black oxide coating for corrosion resistance, and are available in many different ratios to fit a variety of Ford differentials. ** Note: 3.15 Ratio Differential not compatible with 3/31, 3.55, 3.73 and 4.09 ratio gears. Use differential M-4204-MT or M-4204-M. * This part is designed and intended for competition use only. It should not be installed on a vehicle that is driven on public roads and highways. Installation of this art on a vehicle driven on public roads and highways is likely to violate U.S. and Canadian laws and regulations relating to motor vehicle emissions.. Ford Racing ring and pinion sets are engineered, manufactured, and tested for maximum performance. These ring and pinion sets are finished in a black oxide coating for corrosion resistance and are available in many different ratios to fit a variety of Ford differentials. Note: 3.15 Ratio Differential not compatible with 3/31, 3.55, 3.73 and 4.09 ratio gears. Use differential M-4204-MT or M-4204-M. This part is designed and intended for competition use only. It should not be installed on a vehicle that is driven on public roads and highways. Installation of this art on a vehicle driven on public roads and highways is likely to violate U.S. and Canadian laws and regulations relating to motor vehicle emissions.. Ring Gear And Pinion Set; 3.73 Gear Ratio; 8.8 in. Ring Gear Dia.; Incl. Ring And Pinion/OEM Crush Sleeve/Pinion Nut; For Use w/Super Independent Rear Suspension Center Section;. Ford Racing 15-25 Mustang GT 3.73 Ratio 8.8in Ring and Pinion Set. Requires Aftmkt Calib. If Vehicle Not Equipped w/This Gear Ratio. OEM Quality Provides The Strongest/Quietest Gears On The Market. Mustang IRS Super 8.8-Inch Ring And Pinion Set-3.73 Ratio. Incl. OEM Crush Sleeve and Pinion Nut. Requires M-4210-B3 Install Kit. Differential Ring and Pinion. Ring Gear And Pinion Set. Ring and Pinion Kit. Made in the USA

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