A special model only available for the 1970 model year was the Challenger T/A (Trans Am) racing homologation car. In order to race in the Sports Car Club of America's Trans American Sedan Championship Trans Am, Dodge built a street version of its race car (just like Plymouth with its Plymouth 'Cuda AAR) which it called the Dodge Challenger T/A (Trans Am). Although the race cars ran a destroked version of the 340, street versions took the 340 and added a trio of two-barrel carburetors atop an aluminum intake manifold, creating the 340 Six Pack. Dodge rated the 340 Six Pack at , only more than the original 340 engine (which also had the same rating as the Camaro Z/28 and Ford Boss 302 Mustang). Air came in through a suitcase-sized air scoop molded into the pinned down, hinged matte-black fiberglass hood. A low-restriction dual-outlet exhaust ran to the stock muffler location, then reversed direction to exit in chrome tipped "megaphone" outlets in front of the rear wheels. Options included a TorqueFlite automatic or pistol-grip Hurst-shifted four-speed transmission, 3.55:1 or 3.90:1 gear ratios, as well as manual or power steering. Front disc brakes were standard. The special Rallye suspension used heavy-duty parts and increased the rate of the rear springs. The T/A was one of the first U.S. muscle cars to fit different size tires at the front and rear: E60x15 Goodyear Polyglas in the front, and G60x15 on the rear axle. The modified chamber elevated the tail enough to clear the rear tires and its side exhaust outlets. Thick dual side stripes, bold ID graphics, a fiberglass ducktail rear spoiler, and a fiberglass front spoiler were also included. The interior was identical to other Challengers.