In 1967, Plymouth introduced the GTX as the trim level for their mid-size Belvedere. Positioned as the "gentlemen's hot rod," the GTX came standard with the Commando 440 cubic inch big block with the 426 cubic inch Hemi as the only optional engine. Today, there is one more option thanks to our Gen III Hemi swap systems.

The #1 stop for cat-back, axle-back, headers, mufflers, and more! With brands like Flowmaster, Hooker Blackheart, Hooker Classic, Flowtech, Hurst, APR, Dinan and Edge, Holley has the perfect exhaust system for your ride. Whether it is a classic muscle car, late model muscle, sport compact, Jeep, truck, diesel, or European vehicle, we have the exhaust systems available to make your ride stand out from the rest and perform at its best.