Diamond Eye K4114A-RP Turbo-Back Exhaust Kit FOR 2001, 2002, 2003, 2004, 2005, 2006 & EARLY 2007 -CHEVY/GMC 6.6L DURAMAXDIESEL2500/3500(ALL CAB AND BED LENGTHS) 4" ALUMINIZED -PERFORMANCE DIESEL EXHAUST KIT DOWN PIPEBACK(OFF-ROAD)SINGLE