Dr. Gas crossovers and boomtubes were used on NASCAR, Busch, IROC, ARCA, Craftsman Super Truck, and sponsor of American Race Truck Series (A.R.T.S.).Our parent company, Pro-Motorsports Engineering, Inc. started Dr. Gas in 1992, when we saw a need/void in ultra performance exhaust systems. Thus, Boyd Butler, refined and perfected the 'X' style synchronizing crossover systems.
Our synchronizing crossover kits are the latest generation, high-tech crossover system for V6 and V8 engines. It obsoletes all other crossover designs. Typical h.p. / torque gains are between 5-30, depending on application.
In 1995, Dr. Gas came onto the NASCAR scene winning the Daytona 500 with Sterling Marlin's #4 Kodak car. We are noted with changing "the sound of NASCAR" with the 180 degree header type sound that Indy cars are famous for.