Why not order the FRPP M-5230-V6* its a dual exhaust for the v-6 or 2005-08 V6 MUSTANG POWER UPGRADE PACKAGE
M-2007-FR1V6*** M-2007-FR1V6
Unlike the competition, Ford Racing Power Upgrade Packages are 50 State Street Legal and covered under WARRANTY when Ford or Lincoln Mercury Dealer installed and certain conditions apply. See www.fordracingparts.com for warranty information.
* Fits 2005-08 V6 Mustang with Manual or Automatic transmission.
* 12 hp increase over stock
* Kit includes:
85mm Cold Air Kit M-9603-V605
Dual Exhaust Kit with X-Pipe M-5230-V6
Includes mufflers used as standard equipment on the 2008 Mustang Bullitt
Performance Oil Filter
* Premium fuel only
* Due to multiple calibrations, online registration is required to receive Pro-Cal tool after purchase.
* Engine calibrations are developed and supported for U.S. and Canadian vehicles only
* Pro-Cal tool voucher included with kit
* Ford Racing Cold Air Kits utilize production quality components which mount in the stock location. The higher flowing molded plastic bucket features a painted Ford Racing logo with unique air tube providing an enhanced intake sound specific to the V6 Mustang
* 50 State "Street Legal" (E.O. #D-598-2)
so this is sort of a dealer option If deal puts it on has a 3 year 36K mile warrenty