Stifflers

Direct replacement for 1979 - 1981 Foxbody Mustang! This crossmember is designed to fit the narrow (2 ¾") mounting bracket of the 79~81 Foxbody Mustangs and  requires No...

Upgrading to a C4, Power Glide, TH-350, or Top Loader transmission?  You need this! Here's it is, a direct fit for upgrading your Fox to a C4, Power Glide*,TH-350*, or Top Loader transmission...

Putting a T-45, T-45 Cobra Spec, T-56 (includes Magnum & XL), TR-3650 or TH-400 in your Fox?We have the Crossmember for you! A direct fit for upgrading your Fox to a T-45, T-45 Cobra Spec, T-56,...

Works with more applications...T-5, AOD, AODE, 4R70W, G101A, GF5R, TKO, TKX, TR-3550, C6 & 4L60E**! This unique single tube design adds stiffness and strength far beyond that of the OEM versions...

Works with AOD, AODE, 4R70W, C6, G101A, GF5R, T-5, TKO*, TKX*, TR-3550, and 4L60E** transmissions. This unique single tube design adds stiffness and strength far beyond that of the OEM versions...

"The" Crossmember for your '94-'98 Conversion! Direct bolt-in Upgrade for a T-45 & TR-3650 Swap This unique single tube design adds stiffness and strength far beyond that of the OEM versions...

Your answer for Converting a '94-'98 to T-56 (all), T-45*(Cobra Spec) & TH-400** A direct fit for upgrading to a T-56(including Magnum & XL), T-45*(Cobra Spec) or TH-400**...

1996-1998 COBRA - For T-56 (All), *Cobra Spec T-45 & **TH-400 Transmissions This crossmember is specifically designed to be used with the 96-98 Cobra "bolt-on" style crossmember mounts when...

"The" Crossmember for your 1994 - 1998 Conversion - Direct bolt-in  for your C4, PowerGlide*, TH-350* & Top Loader Swap! This unique single tube design adds stiffness and strength far beyond...

"The" Crossmember for your Transmission Upgrade 1949 - 1979 2wd F-1/F-100/F-150 Trucks (For AOD, AODE, 4R70W, c4, C6, T-5, T-45, T-56, TKO, 3550, 3560, TH350, TH400, Powerglide & More!) (*Does...

A direct replacement for the flimsy, stamped steel OEM unit, this crossmember is a great addition to your F-150 truck! Transmission Crossmember 1999-2004 Lightning / Harley Davidson Designed to be a...

"The" Crossmember for Your '80-'97 2wd F-150/F-250 Transmission Upgrade (For AOD, AODE, E4OD, 4R70W, C4, C6, T-5, T-45, T-56, TKO's, 3550, 3560, TH350, TH400, Powerglide & More!) (*Does NOT...

"The" Crossmember for Your '80-'97 2wd F-150/F-250 Transmission Upgrade (For 6R80, 10R80 and MT-82 transmissions) This Stifflers tubular crossmember kit is a great addition to your OBS Ford Truck...

79-04 Mustang Custom Transmission Install Kit This kit comes with all you need to custom install a transmission that is not currently covered by one of Stifflers existing crossmembers for your...

The FIT System is a modular approach to achieving the ultimate  in chassis stiffness and strength through design. By integrating three key components into a modular system, the Fully...