Mine pops from my leaks. I've heard cases of mild popping because of an offroad h-pipe. Unfornuately I have both. Right now, my car sounds like the mufflers are going to fall off when I let off hard acceleration. Oh well, the guy before me did all the exhaust, now I got to do it right 
__________________
1989 Black Mustang GT Hatchback, Underdrive Pulles, Electric Fan, Cold Air Intake, Headers, Offroad H-Pipe, Magnaflow catback, Steeda Tri-Ax, Fluidyne Aluminum Radiator, Timing at 14*, 3.73's
Coming not so soon: 408w
Ricer Hater's Club Member #59
|