2003-2004 Cummins 4" Turbo Back Exhaust - No Muffler (411031 / 412031)

The 411031 / 412031 is a 4" turbo-back exhaust system for the 2003-2004.5 Dodge Ram. It replaces your restrictive OE exhaust system with a 4" mandrel-bent straight pipe exhaust system. Just like all of Flo-Pro Manufacturings Exhaust kits, it will come with all the required clamps, pre-weld contour bent hangers, and stronger flanges to help you sail through the installation process. This kit is intended for race use and has no muffler. You can also expect increased performance, improved flow, and lower EGT's.

This compatible with turbos featuring smaller turbo collars. For larger turbo collars, click here.

Part Number: 411031 / 412031

• 4" Turboback Single Exhaust system.
• No Muffler
• Aluminized Steel & Stainless Steel Options
• Single Side Exit
• Easy Install - Mounts to OE Hangers

Aluminized steel is the budget-friendly choice. It has a protective coating that holds up well, but once that coating wears it will eventually rust through, especially in salted winter climates. The stainless option is T409 stainless, an automotive-grade steel built to resist rot, and it will typically outlast the truck. T409 is not polished show-grade stainless, so light surface rust or discoloration can still show up over time. That is cosmetic only and won't affect performance or service life.

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• ?

  is this exhast system 4 inch ID or OD

  Outside diameter.

• ?

  is this exhaust system 4inch ID or OD

  This exhaust is OD or outside dimensional.

• ?

  will this fit a long box

  Yes, this will fit your long box.

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  Does it fit a 4 doors 8 foot bed

  Yes.