If you go the exhaust shop route go with a bigger 2 1/2 inch exhaust pipe for sure. It won't cost much more than the 2 inch, and more importantly if you want more performance later the pipe size is already correct for a single exhaust system. Let's say a 2 1/2 exhaust pipe to a 22329 muffler and a 2 1/4 tailpipe will give you a nice very quiet system with good flow compared to the pipes in the pictures. Decide later to go for more performance? Just change the muffler. Go with headers or twin cast manifolds? Just merge it into the 2 1/2 exhaust pipe. The cheap version of 22329 is 18274. 22329 was used on 305 Chevy pickups and 2 of them were used on the 350 Olds V8 diesel pickups, not loud at all. Summitt price: 22329 $52.97, 18274 $ 32.59. The muller shop may have a better price for the same part. Jay 6155
