Description
Part #: frpM-4001-88355B
- Loaded differential housing for Mustang IRS
- Fits 2018-2022 Mustang
- Fits 2015-2017 Mustang (see technical notes below)
- Iron housing with aluminum cover
- Includes 3.55:1 ratio gear set M-4209-88355A and Traction-Lok differential M-4204-M
- Custom calibration required for speedometer and shift corrections
- Original Equipment on 2019 Mustang GT
- Note-on 2015-2017 Mustang, pinion flange change may be necessary; comes with pinion flange with 93mm bolt circle and 110mm driveshaft pilot installed. For applications that require 95mm bolt circle and 113mm driveshaft pilot, use FR3Z-4851-B pinion flange, available through Ford dealer
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