Ask any older hot rodder about exhaust cutouts or dumps. In the old days, lakes racers would drive to the track and uncork the exhaust with a simple three-bolt cap so they could go faster. Most hot ...

These are the most common sizes and shapes of the XR-1 mufflers. The oval is the most popular for street cars because it doesn't hang down as far as the others and has more packing material. After all ...