Originally Posted by 08XLT4x4
That sounds about right. i dont understand why anyone would buy a pre fabed cat back "system" from Borla, magnaflow etc for $550+. It makes no sense.
Because they are mandrel bent piping and don't have kinks in their bends like your run of the mill muffler shop ones do. Non mandrel bent exhaust will net you a loss in power where as mandrel bent will gain power. But if your just doing dumped right after the muffler you will be ok with a muffler shop exhaust since the only bend is the tiny little bit on the turndown. An exhaust shop might not know what they are doing and use the wrong diameter tubing like they did on the exhaust I have, the piece inbetween the flex piece and the muffler is smaller then the stock tubing before the flex piece.
I should get a picture of the exhaust my truck is on it (came with it when I bought it) its got like 8 crappy bends in it after the muffler. I'm gonna have a muffler shop cut it off and weld a little turn down to the Flowmaster.
Also I'd try and go to small local owned muffler shop for the best price and probably best work, for ****s and giggles me and my friend walked in a Midas since we were at the store right next to it, told em I wanted the exhaust cut off after the muffler and a little turndown welded on. The guy told me $80, I told him he was insane and walked out, called a local muffler shop and was told $25 max.