I have the two stock GT mufflers that I am waiting to get installed for the dual exhaust set up. My question is, do I need to order the stock GT muffler hanger for the left side of the car to have it installed, or can it just be welded up at the muffler shop. I want it done right but, I dont know if it will make a difference either way. Anyone who has done this, your input would be greatly appreciated.

 

Order and install factory muffler hanger parts, 1-they fit and 2-they isolate vibrations and 3-Well they just plain look right!
All IMHO

 

you should of got the whole GT system.