Join Date: Nov 2010
Location: Joliet, Illinois
Well you have definitely increased your flow by adding the mids and high-flow cats including the solo axle-backs, but your stock midsection is choking you down a bit in both flow and sound, maybe losing a handful of HP. The kink-pipe just after the stock mid-muffler goes down to just 1.75" IIRC. At the end of the mid-pipe where the flanges meet with the mufflers, that flex section chokes down to 1.75" or 2", don't remember specifically.
I'm assuming you want to keep your Solo a/b's so what I would suggest is getting the mid muffler and resonators deleted and adding the Magnaflow 12468 muffler. It is an X-pipe internally within the muffler housing with sound absorption materials, so you get all of the benefits of an X-pipe with some noise management also. I think a lot of people are running this setup or something similar since I remember reading through a lot of exhaust threads stating that a regular X-pipe with headers and Solo's were too loud and obnoxious for some.
Someone else should chime in with some info and personal experience with it. Shop for price on these mufflers, they really are worth the money, all stainless construction, quality stuff. Hope this helps!
2008 White Hot GT w/ Premium Pkg. 185k miles and counting!
Blueline Performance DoD delete deluxe pkg w/ "The Probationary" Cam, Pypes Headers, Spectre Intake, ZL1 fuel pump
Tuned by Bob at Next Gen Built Performance