Product Description
Overview
Unlock classic MBRP sound, lower EGTs, and better flow with the Installer Series 4" cat-back for the 2004.5–2007 Dodge Ram 2500/3500 5.9L Cummins. Built from durable aluminized steel with a single side exit, this bolt-on kit is engineered to last and tuned for daily driving, towing, and weekend fun.
Fitment
- Vehicle: 2004.5–2007 Dodge Ram 2500/3500, 5.9L Cummins (Common Rail, Cummins 600/610)
- Drivetrain/Cabs: All cabs & beds, 2WD/4WD
- Configuration: 4" cat-back, single side exit; installs behind the factory catalytic converter
- Material/Series: Aluminized steel (Installer/Armor Lite)
- Emissions Note: Cat-back system; retains factory catalytic converter
Cross-Reference / Alternatives (MBRP Only)
- 4" T409 stainless alternative (same years): MBRP S6108409
- 5" aluminized cat-back (more flow): MBRP S61180AL
- 5" cat-back, no tip (same years): MBRP S61180P
- 5" cat-back, no muffler (loudest): MBRP S61180PLM
What’s Included
- 4" cat-back tubing, over-axle/tail section, MBRP muffler (where applicable)
- Hangers, clamps, and installation hardware
- Direct-fit design using factory locations (no welding required)
Why Buy From CPP Diesel
- Diesel-specific product curation and real tech support
- Fast shipping and hassle-free returns
- Thousands of 5.9L CR parts backed by enthusiasts
FAQs
Will this fit my early-2004 truck?
No. This S6108AL kit fits 2004.5–2007 (Common Rail 5.9L). Early 2004 (’03–’04) trucks require different MBRP part numbers.
Is this a turbo-back or cat-back?
It is a cat-back. It connects behind the factory catalytic converter and retains emissions equipment.
How does sound compare to stock?
Expect a deeper tone with reduced backpressure. For maximum volume, consider the 5" no-muffler option (S61180PLM).
Does this include a tip?
Tip availability varies by kit. If you specifically want a “no tip” variant, see S61180P.
