Just found my list!
Anyways there is SLP Performance down in Toms River. But they only install their own stuff I believe. They do have a pretty nice sounding exhaust for our trucks though. Did talk to these guys on the phone for a little and if you haven't heard of them you should look them up, they make some great products, but most of it is for muscle cars. They are the company behind the SLP Panther Camaro. Anyways here is their website www.slponline.com
No Limit Performance in Keyport, NJ. Don't know much about them other than they are in NJ and are a performance car shop. Here's there website www.nolimitperformancenj.com
GC Automotive & Performance in Jamesburg, NJ. I went down to this shop and had them look at my truck and talked a bit with them. Pretty nice place and the guy knew his stuff. I was probably going to end up going with them if I had actually gone through with my install when I talked to them. Price they quoted me was pretty fair and he was willing to work with me about a few specific details I had. Heres their website www.gcracing.net
JDM Engineering in Freehold, NJ. These guys are mainly Ford specialists but its mostly mustang stuff I believe. Again its just another performance shop I found. Never ended up talking to these guys so I can't say anything about them. Heres their website www.teamjdm.com
Lastly, heres the link for the shop I mentioned in the previous post www.profabchassis.com/FLASH/index.html
These shops are mostly central and south jersey. Only one is north jersey. I spent a lot of time this summer looking for shops in NJ that would be able to do what I was looking for (some exhaust work) and there didn't seem to be many places, especially near me (I'm in north jersey). These are the ones I was actually able to find and since I didn't mind driving down to see them I kept them on my list. You'll probably notice that they pretty much all specialize in muscle cars as I was looking for a performance shop not just some crappy muffler shop. When I was searching I couldn't find any performance truck shops except for a diesel one and they won't work on gas trucks (I tried to convince them to) so my list ended up with almost all muscle car performance shops. Anyways I'll shut up now
Hope you find what you're looking for!