MBRP Armor Plus Muffler M91031, 4-Inch Inlet and Outlet, 30-Inch Overall Length, T409 Stainless Steel

Get the sound that you want with our wide range of canister style performance mufflers in singles or duals. Armor Plus Muffler; 4 in. Inlet/Outlet Diameter; 6 in. x 24 in. Body; 30 in. Overall; T409 Stainless Steel; 4 in. Outlet Diameter Tip; Replaces All 30" Overall Length Muffler.

• Spiral Louver Design Accelerates Gas Flow. Long Lasting Core. High Density Packing Ensures Long Life. Classic MBRP Sound.
• Every Muffler Features Classic MBRP Inc. Sound
• Spiral Louver Design Accelerates Gas Flow
• High Density Packing Ensures Long Life
• Long Lasting Core

Upgrade your exhaust system with the MBRP Armor Plus Muffler, Part Number M91031. Designed to replace mufflers with a 30-inch overall length, this canister-style performance muffler delivers the classic MBRP sound while supporting efficient exhaust flow. Its 4-inch inlet and outlet configuration makes it suitable for compatible automotive exhaust applications requiring a durable, high-flow muffler.

The MBRP M91031 features a spiral louver core that accelerates exhaust gas flow and a long-lasting internal construction engineered for dependable service. High-density packing helps maintain sound quality and durability over time, while the T409 stainless steel construction provides reliable resistance to corrosion and heat in demanding exhaust environments. The muffler is designed for applications using a 4-inch outlet diameter tip and a 30-inch overall muffler length.

Key Product Specifications and Technical Data:

• Brand: MBRP
• Part Number: M91031
• Product Type: Canister-style performance muffler
• Inlet Diameter: 4 inches
• Outlet Diameter: 4 inches
• Body Size: 6 inches by 24 inches
• Overall Length: 30 inches
• Construction Material: T409 stainless steel

What's Included: One MBRP Armor Plus performance muffler. Exhaust installation hardware, tubing, clamps, and outlet tips are not included unless specified separately. Verify vehicle compatibility, exhaust routing, inlet and outlet configuration, and required installation components before ordering. This product is intended for compatible automotive applications and may not be emissions-approved for use in all regions.

Features:

• Spiral louver design accelerates exhaust gas flow for efficient muffler performance.
• T409 stainless steel construction provides durable service in high-heat exhaust environments.
• High-density packing helps maintain consistent sound quality and supports long service life.
• Classic MBRP sound delivers a performance-oriented exhaust note for compatible applications.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1