Diamond Eye K4334A Turbo-Back Exhaust Kit FOR 2003.5, 2004, 2005, 2006 & 2007 -FORD 6.0LPOWERSTROKE DIESELF250/F350(ALL CAB AND BED LENGHTS) 4" ALUMINIZED - PERFORMANCE DIESEL EXHAUST KIT TURBO BACK SINGLE- 3.5" (2 PIECE) DOWN PIPE