2004.5-07 Dodge 325 HP Standard Cab with Long Bed or Crew Cab with Short Bed MonsterÃÂÃÂ® Diesel Duals Exhaust 4 stainless mandrel-bent system. Dramatically improves flow; virtually no backpressure; lowers EGTs; safely clears spare tire; throaty sound; huge polished ob-round tips. This is a Cat back exhaust system. Monster Diesel Duals 4 exhaust system flows up to 88% better than stock and virtually eliminates backpressure. The streamlined 4 turbine outlet pipe (not required with 325 hp systems), intermediate pipe(s) and 3-1/2 tailpipes are formed of stainless, heavy-wall tubing with constant-diameter bends to maximize airflow and lower exhaust gas temps. The dual tailpipes have 52% more flow area than a single 4 tailpipe. Banks' polished-stainless Monster muffler features a straight-through 4-diameter flow-path with an exclusive expansion chamber to dissipate the annoying mid-range exhaust drone that accompanies most straight-through mufflers. The muffler utilizes spun ceramic, very-high-temperature packing, flows up to 129% better than stock, and delivers the signature Monster sound in stereo. Now for the cool part: Banks' exclusive 6 X 5 ob-round polished-stainless angle-cut rolled-edge tailpipe tips (patent pending)! System safely clears spare tire, shocks and brake lines. Install Time: Approximately 3 hours. Install Manual for 2004.5-2007 Ram Cummins Diesel Truck models: 48702-48705 There are 3 different kits available for the 2004.5-2007 5.9L Dodge Cummins Diesel Ram Truck. Please choose the right kit for your truck.