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Dodge Cummins T-304 and T-409 Stainless Steel Four Inch System
The Diesel Performance Parts Dodge Cummins 5.9 diesel exhaust system is designed to replace the entire factory exhaust system for 2003 and newer model years. The Diesel Performance Parts system is manufactured of mandrel bent T-304 or T-409 stainless steel tubing and welded hanger components. T-304 mandrel bent stainless steel is the industries premium material for exhaust system use, the best of the best! Every system is packaged to fit any style cab or bed length. This is accomplished without any cutting, as the tubing is precisely designed for each body and bed style.
The Diesel Performance Parts Dodge Cummins system begins with a four inch T-304 or T-409 stainless steel down pipe, followed by the four inch intermediate pipe. The Diesel Performance Parts spiral flow muffler is manufactured from T-304 stainless steel that includes a five inch T-304 mirror polished stainless steel, rolled edge tip.
The spiral flow louver muffler is a six inch round by thirty inch long T-304 stainless steel case, containing an inner packing material made of stainless steel wool, with a ceramic wool outer packing. The interior of the muffler is a one piece four inch T-304 stainless steel tube that dampens the resonance of diesel exhaust and still keeps the interior noise level of the cab within three decibels of the original
factory sound level. Diesel Performance Parts muffler design uses a spiral flow louver that is specifically designed for diesel exhaust performance. The spiral pattern (view picture) of the louvers promotes the same twist the turbocharger introduced to the exhaust gasses as they left the turbocharger housing. The spiral flow of the louvers helps speed the exhaust gasses out of the exhaust system to lower the exhaust gas temperatures as quickly as possible.
The entire Diesel Performance Parts system uses welded on T-304 stainless steel hangers to make installation extremely easy. This is also the most secure and permanent method of mounting, exactly like the original equipment system was designed. Systems that use clamp on hangers are more difficult and time consuming to install and generally the system does not hang on the truck as well. Clamp on style hangers are generally made of mild steel and will rust and fail over a short period of time, then the system will loosen up and misalign itself. Diesel Performance Parts welds on T-304 stainless steel hangers whenever possible to eliminate this problem. The joint clamps provided in our systems are plated to prevent corrosion and provide a long life. Stainless steel joint clamps can not be used as the threads of the fasteners will “gall up” when tightened sufficiently to seal the joints. Stainless steel tubing is extremely hard and the joints will need to be clamped to a much higher torque value than in a mild steel system.
  The tail pipe is a four inch T-304 or T-409 stainless steel mandrel bent tube that provides the maximum clearance for the suspension and spare tire during installation. The Diesel Performance Parts five inch rolled edge, polished T-304 stainless steel tip is designed to help eliminate diesel soot from collecting on your truck or trailer. Some systems use a chrome plated tip, unfortunately these tips have a very short life span. The tip is directly behind the rear wheels and is

battered by road debris causing the chrome-plated tips to begin to rust very quickly but not T-304 stainless steel.

The Diesel Performance Parts Dodge Cummins system has been dyno tested to provide as much as 24 horsepower and 53 foot pounds of torque. The average gain is 19 horsepower and 43 foot pounds of torque. The Diesel Performance Parts system will lower your exhaust gases by up to as much as 200 degrees, while providing a quicker spool up time on your turbocharger. There are even fuel mileage gains with our exhaust system. The mileage gains will vary by individual driving style and location. Extra power is great, but lower exhaust gas temperatures will allow you to make other performance modifications to your diesel engine and still keep the exhaust gas temperatures still at a safe level.

The Diesel Performance Parts T-304 stainless steel system are protected by their exclusive Limited Lifetime Warranty, to the original purchaser. The Diesel Performance Parts T-409 stainless steel systems are protected by their 10 year warranty.

2003+ T-304 Stainless Steel Dodge Cummins 5.9 (2003 and newer)

2003+ 5.9 Liter, Turbo Back, T-304 Dual Exhaust, Dual 5 Inch Stainless Steel Tips (2003 and newer)

2003+ 5.9 Liter, Turbo Back, T-409, 5 Inch, Stainless Steel Tip (2003 and newer)

2003+ 5.9 Liter, Turbo Back, T-409 Dual Exhaust, Dual 5 Inch Stainless Steel Tips (2003 and newer)

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