Product Description
MBRP S6108409 is a 4" T409 stainless, single side-exit cat-back built for durability, flow, and that clean MBRP tone on your 2004.5–2007 Dodge Ram 2500/3500 5.9L Cummins. The XP (T409) series is designed to thrive in harsh climates while delivering a straightforward bolt-on install using factory hangers.
Fitment
- Vehicle: 2004.5–2007 Dodge Ram 2500/3500 with 5.9L Cummins (common-rail “600/610” models)
- Configuration: 4" cat-back, single side exit
- Drivetrain/Cab: All common cab & bed configurations that accept single side-exit cat-back routing
- Emissions: Cat-back system designed to work with the factory catalytic converter
- Series/Material: XP Series, T409 stainless steel
Why Buy From CPP Diesel
- In-stock MBRP selection curated for 5.9L Cummins
- Fast shipping and knowledgeable diesel support
What’s Included
- Front/intermediate pipes, over-axle & tail section, clamps, and hardware
- Direct-fit, no-weld installation with OEM-style hangers
Cross-Reference / Alternatives (MBRP Only)
- 4" Aluminized (similar sound/performance, lower cost): MBRP S6108AL
- 5" Aluminized (deeper tone, larger tubing): MBRP S61180AL
- 5" Aluminized, no tip: MBRP S61180P
- 5" Aluminized, no muffler (race profile): MBRP S61180PLM
Helpful Notes
- Reuses the OEM catalytic converter (cat-back layout).
- T409 stainless may develop surface oxidation; it’s cosmetic and typical for XP-series kits.
FAQ
Will this fit my 2004 Cummins?It fits 2004.5 “600/610” common-rail models through 2007. Early 2004 (2003–early ’04) trucks use different part numbers; see our 03–04 MBRP listings if needed.
Is any welding required?
No. It’s a bolt-on kit that uses factory-style hangers and includes clamps and hardware.
How does XP (T409) compare to AL (aluminized) or Pro (T304)?
XP (T409) balances value and longevity versus aluminized. T304 offers the most corrosion resistance but at a higher price. Sound/performance are primarily dictated by tubing size and muffler configuration, not just material.
Is a tip included?
Refer to the product photos and “What’s Included” above. Tip inclusion varies by specific sub-series; if you need a particular style, ask our team.
Will this trigger a check-engine light?
As a cat-back that retains the factory catalyst and sensors, it’s not expected to cause CELs when installed correctly.
