Mustangs have been notorious for having front end chassis flex since their debut in 1964. In 1995 Ford decided to help solve the problem on some Mustang models by installing a triangular strut tower brace that helped join the flexing strut towers together and then join them to the firewall for additional strength. Only problem was they did not work with any aftermarket intakes, cold air kits and other engine mods. These robotically welded BBK design strut tower braces are now available to fit most Mustang applications and fit with most engine modifications. Constructed from super strong tubular steel that helps strengthen the front chassis even more.