Product Description
MBRP MDS930 is a universal 4" muffler bypass (muffler delete) built in Armor Plus (T409 stainless steel) for long life and maximum flow. It’s a straight-through 30" overall section designed to replace any 4" muffler with the same overall length for a louder, freer-flowing exhaust tone while keeping backpressure to a minimum.
Fitment
- Universal 4" systems (diesel or gas) where a 30" overall muffler is used—measure before ordering.
- Inlet/Outlet: 4" (single, straight-through)
- Overall Length: 30"
- Material: T409 Stainless (Armor Plus)
Cross-Reference / Alternatives (MBRP only)
- MDS30 — Armor Pro (T304 SS) 4" x 30" Muffler Bypass
- MDDS927 — Dual 4" (T409) Muffler Bypass, 27.5" OAL
- M91031 — 4" High-Flow Muffler (T409) 24" body / 30" OAL
- M1004S — 4" Quiet Tone Muffler (T409) 24" body / 30" OAL
- R1009 — 4" Resonator (T304) 12" body / 18" OAL
- R2009 — 4" Resonator (Aluminized) 12" body / 18" OAL
Helpful Notes
- This is a universal section; verify your system uses a 4" inlet/outlet and 30" overall length before purchase.
- T409 stainless resists corrosion better than aluminized and is ideal for harsh climates.
FAQ
Will the MDS930 fit my truck without welding?
Most universal installs use existing clamps if your current muffler is 4" I/O and 30" OAL. Some applications may require welding or band clamps to achieve a perfect seal.
How loud is a muffler bypass compared to a Quiet Tone muffler?
A bypass is the loudest option and will increase overall volume and in-cab resonance. If you want less drone, consider the M1004S Quiet Tone or a resonator.
Is T409 stainless (Armor Plus) better than aluminized?
T409 offers superior corrosion resistance and longevity versus aluminized. If you want the best stainless available, step up to T304 Armor Pro.
What should I measure before ordering?
Confirm pipe size (4"), muffler overall length (30"), and space for a straight-through section. Check hanger locations and clamp style.
