Originally Posted by MustangInTexas View Post
I can't say for sure but will the GT500 fit the V6? The pipes are a different size between the V8 and V6 so some heavy modifications may be needed for that. Please check into this before putting down your money. I don't think your warranty hinges on what mufflers you have (except the warranty on the mufflers themselves).
Yep it will fit a V6, it just requires a little more work, but nothing to ridiculous, just some welding to make sure the pipes line up correctly.
Here's the total cost from someone on another site who had this modification done: GT500 Quad Exhaust or Borla S? - The Mustang Source - Ford Mustang Forums
He managed to get the GT500 AB and valance for $680 (from an FRPP dealer) + $224 (dealership installation), obviously this could be cheaper if you go outside the dealership, but just an idea.
My DD: 2013 V6 Auto (Pony Pkg 202A) Performance White, Comfort & Security Pkg
Future Mods: Steeda Tune & CAI, GT500 Quad Exhaust, Stalker Hood, (still debating which spoiler)