Originally Posted by nards444
so they just took the mufflers off. Is there a DIY instructions out there. Will this mess up the computer. To me it sounds like its still muffled by something is that Cat? Also does this car have true duals or is it a H pipe
Yes, they just gutted the muffler with a strait through pipe. DIY would just be cut the muffler off, slip on this section and tack weld it on.
It won't affect computer -- nothing back past the cats are monitored. LS/LT/SS cars all have true duel exhaust w/ an X-pipe. And yes, the cats (2 per bank, 4 total) do muffle the car a bit.