SLP Exhaust Tip, Single Outlet, 2004-08 F150/2005-09 Mustang 4" SLP offers replacement high-quality exhaust tips, to be used with the popular 2005-09 Mustang GT/GT500 M31013 PowerFlo™ Axle-Back exhaust system, the stock exhaust system found on 2004-07 F-150 2WD & 4WD trucks equipped, with the 4.6/5.4L engine or SLP's 1998-02 Camaro/Firebird PowerFlo™ exhaust system. Each tip is manufactured from 304 stainless steel, they are polished to a mirror finish and feature a 4" diameter high-quality dual-wall with a slash-cut end that compliments the body line. Each tip comes with all necessary hardware and detailed instructions for an easy 15 minute clamp-on installation. Note: These new 4" tips can replace the 3" tips found on part# M31013 PowerFlo™ Mustang GT/GT500 Axle-Back exhaust systems, They also can replace the dual/dual tips or the 3.5" tips found on part# 31083 and part# 31085 Camaro/Firebird PowerFlo™ exhaust systems. Tips sold individually.