We used to run headers with glasspacks and no tailpipes at all. We would downshift to bring the rpm's up and then turn the key off. Then you pumped the shit out of the throttle and held it to the floor while you turned the key back on.........BOOM that sucker would shoot 4 ft.. flames out both sides. LOL That worked with the old carbed engines where it still pumped gas with the key off. It didn't take long to burn the packing out on a set of mufflers. Thats the sound we were going for, the louder the better. Ain't no wonder i can't hear shit anymore. The good ole days.....young and dumb.