Yes it will.... your exhaust system needs to create enough back pressure for your engine or you will burn valves and pistons. I had an idiot friend who ran straight pipes on his 2001 Mustang and 6 months later he needed new heads.... I have been working on cars for 29 years now.... trust me or you will be paying for a new engine....
07-09 Ford Mustang Pypes Violator LH RH Mufflers & Tips Exhaust DAMAGED, Pypes Performance Muffler for 2005 to 2010 Mustang, 2005-2010 Ford Mustang GT Pypes Violator MUFFLERS REAR AXLE BACK Exhaust SFM60V, 05-2010 Mustang Muffler Hangers Stainless, Pypes Performance Exhaust Muffler Hanger Stainless Steel Ford Mustang Pair MHV6, 05-10 Mustang GT V8 2.5" Black Pype-Bomb Axle-Back System, 2011-2013 Mustang GT 5.0 Pype Bomb Axle-Back Muffler System, 2011-2013 Mustang GT 5.0 Pype Bomb Axle-Back Muffler System, 2011-2013 Mustang Shelby GT500 Pype Bomb Axle-Back Exhaust, 2005-2009 Mustang GT 2.5" Axle-back Exhaust w/ Violator Mufflers & Polished Tips, 05-10 Mustang V6 4.0 Pypes Dual Exhaust Muffler System, 2005-2010 Mustang V6 4.0 PYPES True Dual Exhaust System w/ Mufflers & X-Pipe, 1999-04 Mustang GT 4.6L Pypes Stainless Exhaust System w/ Mufflers, Tips & Cats, Pypes MHV6 83-04 Mustang Stainless Muffler Hanger, 2005-10 Mustang GT Pypes Beast Mid Muffler Cat Back Exhaust System, 2011-2013 Mustang GT 5.0 Pype Bomb Axle Back Muffler System Kit, 2005-2010 Mustang V8 Muffler Delete Axle Back, Polished Stainless Steel, 2005-2009 Mustang GT Pypes Muffler Exhaust Kit w/ Tips, 05-10 Mustang GT V8 2.5" 304 SS Pype-Bomb Axle-Back System, 1994-1995 Pypes Mustang GT 5.0 Cat-Back Exhaust w/ Violator Muffler & 3" Tips, 2005-2009 Pypes Mustang GT Catback Mid-Muffler Exhaust w/ 4" Polished Tips, 2005-2009 Pypes Mustang V8 Axle Back Muffler Delete System w/ 4" 304 Tips, Pypes HFM60 05-08 Mustang Stainless Muffler Hanger, Pypes 2011-2013 Mustang Muffler Delete Pype Bomb, 06,07,08,09 Mustang GT PYPES Mid-Muffler Exhaust System, 2005-2010 Mustang GT Pypes SS Mid Muffler Exhaust, 2011 Mustang GT 5.0 Pype Bomb Axle-Back Muffler System, New Pypes 86-04 MUSTANG MUFFLER HANGERS STAINLESS, 05-09 Mustang GT Pypes Mufflers 2.5" Axle-Back Exhaust, 07,08 Mustang V6 4.0 PYPES Dual Mid Muffler Exhaust Kit, Pypes SFM66 05-10 Mustang GT Mid Muffler Dual Exhaust, Pypes SFM66B 05 06 07 08 09 10 Mustang V8 Beast Mid Muffler Exhaust NEW, Pypes SFM66 05 06 07 08 09 10 Mustang V8 Mid Muffler Dual Exhaust, Pypes SFM62SS 05-09 Mustang Muffler Delete System, New Pypes 05-08 MUSTANG MUFFLER HANGERS STAINLESS, 07,08 Mustang V6 PYPES True Dual Mid-Muffler Exhaust, 05,06,07,08,09 MUSTANG GT PYPES SFM60VS MUFFLERS KIT, 05,06,07,08 MUSTANG GT PYPES SFM60VS AXLE-BACK MUFFLERS,