Wasn't sure where to ask, 2004.5, 2500 , 6spd manual, dd clutch, 64/14 super phat shaft tubo, smarty s06 pod, 90 hp injectors, banks ram and intercooler, 5 inch exhaust, s&b intake.....just added 188/220 cam, springs, studs, rods...Towing 10k thru rocky mntns often....last trip before cam...