Local shops usually do a very nice job. I had mine done 8 years ago when I lived in CA at a small muffler shop. I went with 2-5/8" pipe front to back with dual 40 series FlowMasters and an "H" pipe. I have since added LB manifolds and tail pipe splitters. Looks good, fits good and sounds great. The only negative to a local shop is that most often they can not do a mandrel bend. Other than that they typically do a great job and usually a great price... JMO
got that excact same set up ,except I have 2.5" pipes, 2 - Flows 40 and H , no transverse, splitters at the ends, but stock manifolds..got it done at local Meineke shop, cost $500. 2 yrs ago