Curious why some cars have four exhaust pipes? Learn what they do, how they boost performance, and why automakers add them to ...

That brings us to the straight pipe exhaust system ... Some typical examples include the following, but any car can ultimately be modified in this way. The legal limitations around straight ...

Use your car as a flowbench - measure exhaust backpressure to see where improvements can be made. Improve exhaust flow by changing dump pipes ... in a warm climate, a custom cold air intake ...