307435 / 307435 - Application Notes Our STILLEN FX35/FX45 Strut Tower Brace will improve handling and increase chassis rigidity, giving the FX35/FX45 an even more impressive driving experience. Designed as a bolt-on application, the fits perfectly on any the FX models with easy installation, including any FX35 equipped with a STILLEN Supercharger. Best of all, once installed, the FX35/FX45 will offer a higher level of handling and braking abilities while giving your engine bay added touch of style. Installation instructions are included.