650ChargedSTang

i installed a BBK offroad x on my 98 cobra and ever since that there has been this annoying rattling/vibration noise that keeps happening. Every time the RPM's gopast 3k and come back down, it rattles like crazy. Same noise happens when i drive at WOT. I checkdmy mufflers and none are broken and all my bolts are tightend. What could it be???

guarnibl

Yea, my SLP does the same thing you're talking about. It's normal. I'd take it back and get an H-pipe.. that's what I'm doing.