Headers or Test pipes or both with stock exhaust?

Originally Posted by Megan370z

both of you have valid point
so I will shut up ! hehe

if we come back on topic about the oem muffler , it means it cannot support high revving of the engine for an extended period of time.... no matter with cats or test pipe... I just dont see why the muffler would start rattle with just the test pipe ,, i haven't really pushed the oem muffler with cats anyway...

but it was mentioned also by another guy having test pipe and going thru 2 oem muffler ... might be a coincidence ? or the inside baffles are just poorly designed.