Diamond Eye K5118A-RP Turbo-Back Exhaust Kit FOR 2001, 2002, 2004, 2004, 2005, 2006 & EARLY 2007 -CHEVY/GMC 6.6L DURAMAX DIESEL2500/3500(ALL CAB AND BED LENGTHS) 5" ALUMINIZED- PERFORMANCE DIESELEXHAUST KIT DOWN PIPE BACK(OFF-ROAD)SINGLE -4" DOWN PIPE