Anyone got any ideas on this.I can't keep a muffler in the car for more than 3 mo before they start coming apart on me. I removed the glass pack from the car and installed a flowmaster.It took the little pinto about 2 mo to dislodge the baffles and start rattling.So next we tried the corvair turbo muffler,it made it about 3 mo before it went,blowing out the inlet pipe.Next I installed a raptor,3 weeks later it has blown out the tail pipe.I welded it up to stop the noise but it seems every thing inside is loose as well,AHHHHH.The exhaust is properly hung and it has not done any backfiring.Thi s is a basically stock motor,only bolt on engine mods.I'm running a hooker super competition header and 2.5 in exhaust if that may mean anything.I have had no problems with glass packs only can or welded mufflers.
Any ideas