We have expanded our offerings from Stifflers. We now offer the entire catalog of Crossmembers for Ford and GM transmissions alike. Below in the drop down menus you will select your transmission followed by year of Mustang it will be installed into. This will allow you to select the exact part number needed to get the job done. There are options for upgraded solid bushings to replace the poly units included with the crossmembers. Additionally for manual and some auto applications, you can select poly mounts. Crossmember kits do not come with transmission mounts.

All Stifflers Crossmember kits include:

-single tube design for light weight and strength

-polyurethane bushings for chassis mounting(can be upgraded to solid)

-direct fit brackets and hardware

-detailed instructions


Manual transmission kits for T5, T45, T56, T3550, T3650, TKO500, TKO600, G101A, MT82

Auto transmission kits for 6R80, AOD, AODE, 4R70W, C4, C6, TH350, TH400, POWERGLIDE

Stfflers crossmembers are designed for 79-04 Mustangs.