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 ...

Put mufflers on a 1300hp big-block Chevy, and most enthusiasts would guarantee that you'd choke the horsepower down. But the test of Borla's new 4½-inch Shoot-Out Series muffler revealed that ...