Product Description
MBRP GP015 30" HIGH FLOW 4" MUFFLER delivers classic MBRP tone and better flow in a durable Armor Lite (aluminized) can. Ideal for universal 4" systems on diesel trucks where a 30" overall muffler is required.
Fitment
- Universal — fits 4" single in / 4" single out exhaust systems.
- Overall Length: 30" • Body Length: 24" • Body Dia: ~6".
- Common on Ram Cummins, Ford Power Stroke, GM Duramax 4" turbo-back systems (measure your available space and pipe size).
Cross-Reference / Alternatives (MBRP-only)
- MBRP GP016 — 30" Muffler Delete Pipe (4")
- MBRP M20681 — 4" Performance Muffler, 30" OAL (Aluminized)
- MBRP M91031 — 4" Muffler, 24" Body / 30" OAL (T409)
- MBRP M1031 — 4" Muffler, 24" Body / 30" OAL (T304)
- MBRP MK96116 — High-Flow Muffler Assembly (04–07 Ram 5.9L, T409)
- MBRP R2009 — 4" Resonator, 12" Body / 18" OAL (Aluminized)
- MBRP R1009 — 4" Resonator, 12" Body / 18" OAL (T304)
Specifications
| Brand | MBRP |
| Part Number | GP015 |
| Series / Material | Armor Lite / Aluminized Steel |
| Inlet / Outlet | 4" ID / 4" ID (single in / single out) |
| Body Diameter | ~6" |
| Body Length | 24" |
| Overall Length | 30" |
| Configuration | Straight-through, high-flow canister |
| UPC | 882963103901 |
FAQ
Will GP015 fit my truck?
If your system uses 4" tubing and a 30" overall muffler, GP015 will clamp or weld in. Always measure before ordering.
What’s the difference between GP015 and M91031/M1031?
GP015 is aluminized (Armor Lite). M91031 is T409 (Armor Plus) and M1031 is T304 (Armor Pro). All are 4" in/out with 24" bodies and 30" overall length.
Is there a straight pipe option?
Yes — see the 30" delete: MBRP GP016.
Do I need new clamps?
We recommend fresh 4" band or lap-joint clamps during install (sold separately).
