MBRP M1004S Armor Plus Performance Muffler | 4" Inlet / 4" Outlet | T409 Stainless Steel

Universal 4" Performance Exhaust Muffler • Straight-Through Design • Armor Plus Series

MBRP M1004S muffler • 4 inch stainless muffler • diesel performance muffler • universal 4" muffler • straight through exhaust muffler • MBRP Armor Plus muffler • custom exhaust muffler

Overview

The MBRP M1004S Armor Plus Muffler is a high-flow universal performance muffler designed to improve exhaust flow and deliver the deep performance tone MBRP exhaust systems are known for.

Featuring a straight-through perforated core, this muffler minimizes exhaust restriction while allowing exhaust gases to flow freely through the system. The result is improved exhaust efficiency and reduced backpressure for performance-focused builds.

Part of the MBRP Armor Plus Series, this muffler is constructed from durable T409 stainless steel, offering excellent corrosion resistance and long-term durability. This material provides an ideal balance between performance, longevity, and value.

With a 4-inch inlet and 4-inch outlet, the M1004S is commonly used in diesel trucks, custom exhaust builds, and high-performance applications requiring improved airflow.

Key Features

  • MBRP Armor Plus Series universal performance muffler
  • Durable T409 stainless steel construction
  • Straight-through perforated core design
  • Improves exhaust flow and reduces backpressure
  • Produces a deep, aggressive performance exhaust tone
  • 4-inch inlet and outlet configuration
  • High-quality welded construction
  • Ideal for diesel trucks and custom exhaust systems
  • Compatible with most 4" exhaust systems

Product Specifications

Brand MBRP
Part Number M1004S
Series Armor Plus
Product Type Performance Muffler
Inlet Diameter 4 Inches
Outlet Diameter 4 Inches
Material T409 Stainless Steel
Muffler Design Straight-Through Performance Muffler
Fitment Universal (verify pipe size before purchase)

Installation Notes

  • Universal muffler designed for custom exhaust systems
  • Professional installation recommended
  • May require welding or fabrication depending on application
  • Verify exhaust pipe diameter and available installation space before purchase
Fast shipping • Trusted seller • Message us anytime with fitment questions