Product Description
Unlock classic LB7 tone, lower EGTs, and smoother flow. The MBRP S6005P is a 4" downpipe-back, single side exit exhaust built in Armor Lite (aluminized steel) for 2001–2004 Chevy/GMC 2500/3500 6.6L Duramax (LB7) extended/crew cab trucks. Mandrel bends, high-flow muffler, and OE-style routing deliver durable performance you can hear and feel—without drone.
Fitment
- 2001–2004 Chevrolet Silverado 2500HD/3500HD 6.6L Duramax (LB7) — EC/CC
- 2001–2004 GMC Sierra 2500HD/3500HD 6.6L Duramax (LB7) — EC/CC
- Configuration: Downpipe-back, single side exit (passenger side), 4" tubing
What’s Included
- 4" aluminized steel front/mid/tail pipes
- High-flow muffler
- Hangers & clamps, instructions
- (Tip not included; add an MBRP 4"-inlet tip below)
Recommended MBRP Cross-Reference / Alternatives (MBRP-only)
- S6005PLM — Same system without muffler (aluminized, 4")
- S60210P — 5" downpipe-back with muffler (aluminized)
- GMCA425 — 3" turbo downpipe (CARB D-763-2) for LB7 (pairs great with S6005P)
- T5126BLK — 7" OD, 4" inlet, 18" length tip (black)
Specifications
| Brand / Series | MBRP — Armor Lite (Aluminized Steel) |
| Part Number | S6005P |
| UPC | 882963131379 |
| Material | Aluminized steel |
| Tubing Diameter | 4.0 in |
| System Type | Downpipe-back |
| Muffler | Included |
| Exit | Single, passenger side (after tire) |
| Cab Compatibility | Extended Cab / Crew Cab (EC/CC) |
| Tip | Not included (4"-inlet tip recommended) |
| Emissions Note | LB7 (2001–2004) trucks were not factory-equipped with a DPF. |
| Warranty | 1-Year (Armor Lite) |
Why Buy from CPP Diesel
- Fast shipping and diesel-specialist support
- Price-match mindset and curated MBRP selection
- Real LB7 fitment experience and install guidance
Helpful Notes
- Verify bed/cab configuration before ordering.
- Penetrating oil on factory clamps/hangers makes removal easier.
FAQ
Will S6005P fit my 2001–2004 LB7 if it’s an Extended Cab Long Bed?
Yes. This kit is designed for EC/CC LB7 trucks. Check your wheelbase and follow the included instructions for pipe section placement.
What’s the difference between S6005P and S6005PLM?
S6005P includes a muffler for a refined tone. S6005PLM deletes the muffler for maximum volume and slightly lower backpressure.
Do I need a tip and which one fits?
A tip is optional. Any MBRP 4"-inlet tip works—e.g. T5126BLK.
Will this bolt to an aftermarket 3" turbo downpipe?
Yes. It pairs well with the CARB-legal GMCA425 LB7 downpipe.
