intakes,throttle body spacers, andprogrammers. While it’s easy to see how most of these components bolster engine performance, as more airflow equals more power, programmers and tuners are often shrouded in mystery; how does plugging a handheld device into your pickup’s OBDII port increase ...
this can cause back-pressure, which has the same effect. High-performance exhaust systems use headers, big tail pipes and free-flowing mufflers to eliminate back-pressure in the exhaust system. When you hear that a car has "dual exhaust," the goal is to improve the flow of exhaust by hav...