Maybe that is why they incorporated an X-Pipe into the design to even out the gas pulses and assist with back pressure? It's not their first barbeque so I trust them. They work on all models and makes and put in the research. Like I said it sounds fine and I very pleased with the performance of this truck. Sometimes I honestly can't believe how fast it is. It is deceptively quick and I suprise a lot of people and still managed to retain the factory look.