Ford Performance 8.8in 3.31 Ring & Pinion Gear Set M-4209-88331

If you're running an 8.8-inch rear axle on your Fox-body or New Edge Mustang, gear ratio selection directly impacts both acceleration and highway fuel efficiency. The 3.31 ratio strikes that sweet spot—aggressive enough for meaningful off-the-line performance gains, yet tall enough to keep engine RPM reasonable at cruising speeds. Ford Performance's race-proven design, manufactured at their Sterling Axle Plant, delivers the reliability demanded by everything from daily drivers to championship-level drag and road racing programs.

This complete ring and pinion set arrives ready for installation, with all necessary components included. Whether you're upgrading from a stock 3.27 or 3.08 ratio, you'll feel the difference immediately off the line without sacrificing drivability on the highway.

• Axle Type: Ford 8.8-inch
• Gear Ratio: 3.31
• Position: Rear
• Vehicle Fit: 1986–2014 Mustang
• Axle Compatibility: 8.8-inch only
• Origin: USA-manufactured
• Included: Pinion gear, ring gear, crush sleeve, pinion nut
• Installation: Professional setup recommended
• Proven By: Racing teams (drag and road)