Alt differential housings
#37032 from Super Touring Committee · Recommended to the Board · Minutes (2025-05 Fastrack)
In GCR, Section 9.1.4.1.C. add the following:
"(Effective 6/1/25) 3. Front engine rear drive cars may use a Ford 8.8 IRS differential housing in place of the original housing. Rear
subframes may be modified or replaced for fitment but cannot alter the mounting points of the rear suspension greater than
what is allowed in 9.1.4.1.D."