Product Description
Wake up your 5.9L Cummins with the MBRP Performance Series 4" cat-back. This single-side-exit system uses heavy-duty aluminized steel with mandrel bends to reduce backpressure, sharpen throttle response, and deliver a deep, clean tone. Bolt-on fitment to factory hangers; hardware and clamps included.
Fitment
- 2004.5–2007 Dodge Ram 2500/3500, 5.9L Cummins (600/610 rating)
- All cab/bed configurations
- Cat-back system retains the factory catalytic converter
- Does not fit 2003–early-2004 (pre-cat) or 2007.5+ 6.7L trucks
Cross-Reference / Alternatives (MBRP-only)
- Stainless upgrade (4" cat-back, T409): MBRP S6108409
- Installer Series aluminized (4" cat-back): MBRP S6108AL
- Bigger sound/flow (5" cat-back aluminized): MBRP S61180P
What’s Included
- 4" aluminized steel front pipe, muffler, tailpipe (single side exit)
- Clamps and installation hardware
- Uses OEM hangers; tip not included
FAQs
Will this fit my 2004 truck?
This kit is for mid-2004 (2004.5) through 2007 5.9L “600/610” trucks equipped with a catalytic converter. It does not fit early-2004 or 2003 models.
Do I need tuning with this cat-back?
No. A cat-back system bolts on behind the catalytic converter and does not require tuning.
Stainless vs. aluminized—what should I choose?
Aluminized (S6108P) offers great value in mild climates. Choose T409 stainless (S6108409) if you see road salt or want maximum corrosion resistance.
Which tip works with this system?
This system ends in a 4" outlet. Popular MBRP tip upgrades include T5052 (4" in / 5" out). For 5" systems, see T5075BLK.
