Product Description
MBRP R2009 is a universal 4" inlet/outlet aluminized steel (Armor Lite) resonator designed to fine-tune exhaust tone and reduce drone without choking flow. Compact dimensions make it easy to package in tight spaces while preserving that classic MBRP sound.
- Material: Aluminized steel (Armor Lite)
- Inlet/Outlet: 4" ID
- Body Length: 12"
- Total Length: 18"
- Body OD: ~6" can
Fitment
Universal for any 4" diesel exhaust system (Cummins, Duramax, Power Stroke, and custom builds). Weld or clamp into a straight 4" section where additional tone control is desired. Verify space for 18" overall length.
Cross-Reference / MBRP Alternatives
- MBRP R1009 — T304 Stainless 4" Resonator (12" body / 18" OAL)
- MBRP R1013 — T304 Stainless 3" Resonator (16" body / 20" OAL)
- MBRP M2050S — 5" Universal Muffler (T409 Stainless)
Notes
Armor Lite (aluminized) is great for value builds and dry climates. For maximum corrosion resistance, choose the T304 stainless version R1009.
FAQ
Will R2009 quiet my straight-pipe 4" system?
Yes—R2009 reduces rasp and highway drone while keeping a deep tone. It’s a resonator, so the effect is moderate compared to a full muffler.
Clamp-on or weld-in?
Either works. Many installers weld for permanence; band clamps allow repositioning and future service.
What size do I need?
This unit is for 4" systems only. Check for at least 18" of straight length and clearance for a ~6" OD body.
Is there a stainless version?
Yes—see the MBRP R1009 stainless 4" resonator.
