Ford Performance M-4209-88331 Ring Gear And Pinion Set

3.31 Ratio - 8.8 in. CNC Cut And Lapped Gear Teeth Higher Strength And Better Quality OEM Quality Race Proven Standard In Performance Made in the USA Product Documents: Installation Instructions Ford Performance Parts - Ring Gear And Pinion Set P/N M-4209-88331: 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.