Ford Performance Mustang IRS Super 8.8 - Inch Ring And Pinion Set-3.55 Ratio - M-4209-88355A

Ford Performance Mustang IRS Super 8.8 - Inch Ring And Pinion Set-3.55 Ratio - M-4209-88355A is a Ford Performance drivetrain component for enthusiasts building a stronger, more responsive powertrain. Built around Ford Mustang applications, this part is made to improve durability, put power down more effectively, and support harder use than worn or basic replacement components.

Key Features

• Genuine Ford Performance differential with exact part number M-4209-88355A
• Key attributes: 8.8, 3.55
• 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
• Application-specific design; verify exact year, trim, and options before ordering
• Service or bolt-on drivetrain installation; professional install recommended
• Approximate shipping weight: 19.5 lb

Performance Benefits

The payoff is better durability under load, more consistent power transfer, and improved confidence when the vehicle is driven harder. Whether the goal is strength, traction, or reduced driveline slop, this type of upgrade matters where you can feel it.

Vehicle Fitment

Ford Mustang. Exact year and trim coverage was not fully specified in the source data, so confirm application by part number before purchase.

Installation Notes

• Professional installation is recommended
• Inspect mating components, seals, fluids, and hardware during service
• Verify fitment for transmission, axle, spline, and flange requirements before ordering

Emissions Information

Based on the source data for this SKU (EPA:N, CARB:N), this product is not identified as an emissions-system component and is not flagged as affecting factory emissions equipment. Always verify local laws and inspection requirements before installation.