Mustang IRS Super 8.8-Inch Ring And Pinion Set-3.73 Ratio (M-4209-88373A)
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Compatibility
- Platform
- Universal
- Vehicle-specific fitment
- Review application details below
- Need help?
- Confirm fitment with us before ordering — (714) 202-7886
We list the engine platform a part is built for. That is not year-and-trim application data, so it does not confirm a fit on your specific vehicle.
- Est. install labor: 9.0 hrs — $1,125 at $125/hr. Pick Install at HRC and a 20% labor deposit ($225) is due at checkout; the balance is due at completion.
- An estimate for a stock vehicle, not a quote — we confirm it in writing when you book, before any labor is authorized. Seized hardware, prior modifications, diagnosis and machine work are quoted separately; tuning is arranged through our tuning partner. Questions: (714) 202-7886.
- Warranty & track disclaimer — read before you race it.
- Shipping & returns — rates and RMA terms.
- Installed in-house in Huntington Beach, CA — labor & service policy.
- Affirm and PayPal available at checkout.
More ways to pay at checkout
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.
| Part Type | Differential Ring and Pinion |
|---|---|
| Prop 65 Yes/No | No |
| Title | Ford Performance - Mustang IRS Super 8.8-Inch Ring And Pinion Set-3.73 Ratio - M-4209-88373A |
| Weight | 19.55 lb |
| UPC | 756122000571 |
| Country of Origin | USA |
Verified fitment · 29 applications
- Ford Mustang 2.3L (2015–2025)
- Ford Mustang 3.7L (2015–2016)
- Ford Mustang 5.0L (2015–2025)
- Ford Mustang 5.2L (2015–2022)
| Part No. | M-4209-88373A |
|---|---|
| Brand | Ford Performance |
| Part Type | Differential Ring and Pinion |
| Weight | 19.55 lb |
| UPC | 756122000571 |
| Country of Origin | USA |
Platform-level fitment (Ford + GM, Phase 1). We publish the engine platform a part is built for — not year-and-trim application data — so nothing here confirms a fit on a specific vehicle. Confirm fitment with us before ordering: (714) 202-7886.