Thanks for the info. I talked to TTI and decided to go with their system. This is a 2.5 inch manifold back with muffler. Pretty sure they use the dynomax turbo. About $600 shipped and should bolt up pretty easy. Always had good fitment with anything from TTI, and much cheaper than the 2.25 inch Accurate LTD system. Part number TTI A25S6WM6366 at Hughes Engines if anyone needs something down the road. I couldn't find a single pipe slant six set up on the TTI site.
