I have had a Brullen muffler with the stock motor. The I upgraded to the PowerVault Generation 1 Catback. I added the SC and had it dyno'd then. But not before... It dyno'd 216.21HP the I added a custom 2.5 Stainless Steel pipes all mandrel bent and tig welded into Magnaflow cats into a Single 3' in Dual out Magnaflow XL muffler with dual 4' resonated tips, new dyno with that... 225.36. bout 9hp more.
This thread is when Johnnyapollo and I had our VX's dyno'd together on a 4wheel dyno... some good stuff... We were running pretty much the same mods (catbacks, intakes) only that I had the SC on and he did not.
http://www.vehicross.info/forums/sho...highlight=Dyno
Also a thread where I got the new on fabed up:
http://www.vehicross.info/forums/sho...highlight=Dyno
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