Product Description
MBRP S6000AL – 4" Armor Lite (Aluminized) Cat-Back, Single Side Exit
Unlock classic MBRP sound and flow on your LB7/LLY Duramax. This 4" mandrel-bent cat-back retains factory emissions equipment (where equipped) and delivers a deeper tone, lower EGTs, and bolt-on installation.
Fitment
- 2001–2005 Chevrolet Silverado/GMC Sierra 2500HD/3500HD, 6.6L Duramax (LB7/LLY)
- Extended Cab & Crew Cab, Short or Long Bed
- Regular Cab Long Bed requires MBRP GMAL413 regular cab adaptor for proper fitment.
What’s Included
- 4" mandrel-bent front/intermediate pipe, muffler, over-axle & tailpipe
- Clamps and hardware; utilizes factory-style hangers
Cross-Reference / Alternatives (MBRP-only)
- MBRP S6005P – 4" Downpipe-Back (01–04 Duramax)
- MBRP S60210P – 5" Downpipe-Back (01–04 Duramax)
- MBRP S60210SLM – 5" Stainless, No Muffler (01–04 Duramax)
- Finish it with an MBRP tip:
- MBRP T5124 – 5" OD, 4" inlet, 18" length (T304)
- MBRP T5110 – Pro Series universal (choose 4" inlet)
Why Buy from CPP Diesel
- Real Duramax fitment guidance (LB7/LLY) and fast shipping
- Price-match support and enthusiast-grade customer service
FAQ
Will this system delete my catalytic converter?
No. This is a cat-back design that installs behind the factory converter (where equipped) and is emissions-friendly for the listed years/configurations.
Does it fit Regular Cab Long Bed?
Yes, with the MBRP GMAL413 adaptor designed for 2001–2005 RC/LB trucks.
What outlet style does it use?
Single side exit behind the passenger rear tire. You can add a clamp-on tip like the T5124 for a finished look.
What diameter is the tubing?
4-inch mandrel-bent tubing for improved flow and tone.
Is tuning required after installation?
No tuning is required. This is a straightforward bolt-on upgrade.
