Finally got my VX back in the shop to tune and re dyno'd it with the new exhaust and with out the FMU hooked up.
Gained about 9hp over the Powervlaut generation one cat back.
216.21HP old set up 225.36 new setup, not too bad since I was already running a aftermarket catback.
Unfortunately it is way too loud for me and with my new baby this is just not going to cut it. I am going back to the shop, they found a OEM style muffler that is single 3 in and 2.5 dual outs (same as the Magnaflow one just longer) we will see how that goes. I know I am going to kill the power some if not all that I gained and them some but I need it quieter and I am hoping this will do the trick.
Anyone know how much power I might lose? I am keeping all then new plumbing 2.5 Stainless Steel pipes, Magnaflow cats and dual 3' tips.
Mike (morgan-tec), thanks for the offer on the muffler and your advice thru this whole ordeal.
-Dave