Product Description
Unlock flow and classic diesel tone on your 2004.5–2007 Ram 2500/3500 5.9L Cummins with MBRP’s 5" cat-back. The S61180P uses heavy-duty aluminized steel and a straight-through muffler to reduce backpressure and help lower EGTs while retaining a clean, bolt-on install that reuses factory hangers. Tip not included (choose an MBRP tip below).
Fitment
- 2004.5–2007 Dodge Ram 2500/3500, 5.9L Cummins (with catalytic converter)
- All cabs & beds; 2WD/4WD
- Configuration: 5" cat-back, single side exit, aluminized steel, includes clamps & hardware
Cross-Reference / Alternatives
- Prefer stainless 4"? See MBRP S6108409 T409 4" Cat-Back.
- Budget 4" aluminized: MBRP S6108AL 4" Cat-Back.
- Same 5" layout in alternate series: MBRP S61180AL 5" Cat-Back.
- No-muffler option: MBRP S61180PLM 5" Cat-Back (No Muffler).
- Stainless 5" alternative: aFe 49-42012 5" T409 Cat-Back.
Recommended Accessories (No Tip Included)
- Polished 5" OD / 4" inlet tip: MBRP T5124
- Black-coated 5" OD / 4" inlet tip: MBRP T5124BLK
- Turn-down 5" OD / 4" inlet tip: MBRP T5086
Why Buy from CPP Diesel
- Tech-vetted fitment for 5.9L Cummins
- Great selection of 4"/5" systems, clamps, and tips
- Fast shipping & real phone support
FAQ
Does this fit 2003–early 2004 trucks?No. This is a cat-back system for 2004.5–2007 5.9L Cummins trucks that came with a catalytic converter. For 2003–early 2004, use a system designed for non-cat trucks.
Is a tip included?No tip is included. Choose an MBRP 4"-inlet tip like the polished T5124 or black T5124BLK.
What diameter is the tailpipe outlet?Outlet is 4" (accepts 4"-inlet tips). System tubing is 5" from the muffler back for maximum flow.
Will this help EGTs and spool?Yes. The larger 5" system reduces restriction vs. stock, typically lowering EGTs under load and improving throttle response.
What if I want stainless instead of aluminized?Choose MBRP S6108409 (4" T409) or aFe 49-42012 (5" T409).
