Perfect for custom exhaust builders or those that want to add a fully functional exhaust valve setup into their existing system, the Varex muffler with hidden motor gives you a super-neat, easy to install add-on, with plenty of performance. The 9.5” x 4” x 14” stainless steel muffler houses a hidden Varex exhaust valve which allows you to control the sound and exhaust flow of your system simply by powering the supplied loom connector and then activating it remotely with one of the included key fobs. Due to the size and offset-in and central-out configuration, these are ideal for hot-rod and muscle car applications where the existing rear muffler setup can be easily swapped to accommodate this updated Varex setup. Hidden motor design 9.5" x 4″x 14″ Body size Offset in/Center Out 2.5" Single Inlet, 2.5" Single Outlet R Series Varex Not recommended for Turbo vehicles Recommend for Hot-Rod and muscle car application When valve is closed will reduce sound to a quieter sports sounding muffler