Stiffen up that?Stang! The Mishimoto 2015+ Mustang strut tower brace ties the front strut towers together to make for a more rigid chassis. This Mustang strut tower brace can work with or without the stock performance package K-brace, but combining the stock K-brace with the Mishimoto Mustang strut tower brace proves to have the greatest increase on braking and cornering performance. This brace is made from 14 gauge steel tube with CNC-machined steel end plates for maximum rigidity. If competing in stock autocross classes, this 2015+ Mustang strut tower brace will cause you no qualms, as it is legal for those classes. For peace of mind, this Mustang strut tower brace, along with all our 2015+ Mustang parts, comes with the Mishimoto Lifetime Warranty to guarantee quality and performance.