Who are some manufacturers? thanks

 

nobody that I've found...

 

Most exhausts I have seen are 60mm which is just a little over 2.25".
You could always have one custom made, or go with a 3" turbo exhaust.

 

Does anyone know a reputible muffler shop to go to in the Southern California area to get custom piping? I see many muffler shops but I don't trust that they will do a good job. How much will custom piping and installation of a muffler cost usually?

 

I know of one in Costa Mesa. Mesa Muffler on Harbor, near Triangle Square. I don't think they can mandrel bend, but I'm pretty sure they can do custom. They were doing dual Flowmasters on an old street rod (not sure what, old Ford) when I was there. I took my car in because my old Trust exhaust cracked open just behind the resonator. They charged me $15 to weld it shut. Not sure what a full custom would cost.