MBRP M20681 Universal 4" High-Flow Muffler 303" for Custom 4" Exhaust

Vehicle Fitment

• Universal - designed to fit custom exhaust systems or replacements with a 4" inlet and 4" outlet

Features

• Universal Armor Lite high-flow muffler for performance exhaust upgrades
• 4" inlet and 4" outlet for compatibility with standard 4" pipe systems
• 30" overall length with 24" body for substantial internal flow volume
• Aluminized steel construction for corrosion resistance and durability
• Spiral louvers and perforated core design for improved gas flow
• High density packing for refined exhaust tone and reduced drone
• Replaces all 30" overall length mufflers in custom layouts
• Can be welded or clamp-mounted depending on installation needs

Specifications

• Part Number: M20681
• Material: Aluminized steel
• Inlet Diameter: 4"
• Outlet Diameter: 4"
• Body Length: ~24"
• Overall Length: ~30"
• Configuration: Universal high-flow muffler
• Fitment: Custom or universal exhaust systems

Included Components

• 1x Universal 4" high-flow muffler
• (Clamps and hangers not included - install per custom layout)

Product Description

The MBRP M20681 Universal 4" High-Flow Muffler is an Armor Lite series performance component crafted for custom exhaust systems or replacement applications where a standard 4" inlet and outlet are used. Featuring a 24" body and 30" overall length, this muffler's spiral louver and perforated core design improve exhaust gas flow while delivering a rich, deeper exhaust tone - ideal for truck, diesel, or gas-powered builds looking for a balanced sound and performance upgrade.

Constructed from corrosion-resistant aluminized steel, the M20681 muffler is built to endure typical driving conditions and road debris. Its universal design fits many exhaust configurations, replacing all mufflers with a 30" overall length footprint, and can be installed via clamps or welding based on your custom exhaust path. Whether you're building a custom system or upgrading an existing layout, this high-flow muffler enhances throttle response and produces a classic MBRP exhaust tone without excessive drone.