Borla Universal Heavy Duty Truck Performance Muffler - 3.5" Center Inlet / 3.5" Center Outlet (401625)
Optimize the flow velocity and exhaust note of your custom high-displacement gas or turbodiesel rig with the Borla Universal Heavy Duty Truck Performance Muffler. Engineered explicitly for full-size trucks, heavy-duty commercial setups, and large SUV builds that require a long-body casing, this high-performance specialty muffler delivers a deep, robust tone. When compared to Borla's larger 7.75-inch casing alternatives, this 6.75-inch diameter round body delivers a distinctive S-Type sound volume profile outside the vehicle. Inside the muffler, premium high-temperature continuous-filament fiber (CFF) acoustic absorption packing absorbs harsh frequencies to control internal drone while maintaining a classic, rugged performance tone under heavy load or while towing.
Constructed to survive high-vibration truck environments, this universal muffler features a fully reversible straight-through design that offers absolute fabrication flexibility during installation. The unit features standard 3.5-inch notched slip-fit necks, meaning it is purpose-built for a clean, secure clamp-in assembly. The structure features a 6.75-inch round case with a 24-inch body length and a 29.35-inch overall length. Built entirely in the USA from premium T-304 austenitic stainless steel, it is 100% welded for maximum structural longevity. It arrives with a natural mill finish that can easily be brushed or polished by your fabricator before installation. This heavy-duty universal unit is backed by Borla's iconic lifetime Million-Mile Warranty.
Features
- S-Type sound level provides a deep, commanding truck growl with controlled interior cabin resonance
- Long 24" body architecture is engineered specifically for underbody clearance on trucks and large SUVs
- Straight-through, free-flowing internal design increases exhaust gas velocity to maximize power and torque
- Premium continuous-filament fiber (CFF) acoustic material provides long-term sound stability under high heat
- Notched pipe ends are engineered specifically for straightforward, secure custom clamp-in installations
- Fully reversible design allows the muffler to be flipped or rotated to accommodate tight chassis spaces
- 100% welded premium T-304 austenitic stainless steel construction offers ultimate protection against corrosion
- Proudly manufactured in the USA and backed by Borla's legendary lifetime Million-Mile Warranty
Specifications & Fitment
- Inlet Configuration: 3.5" Centered ID (Inside Diameter)
- Outlet Configuration: 3.5" Centered ID (Inside Diameter)
- Muffler Casing Shape: 6.75" Round Body
- Muffler Dimensions: 24" Case Length / 29.35" Overall Length (End-to-End)
- Fitment Type: Universal Fitment for Custom Heavy-Duty Truck, Diesel, Gas V8, and Large SUV Exhaust Fabrications
*Note: This is a universal component and is not a direct vehicle-specific bolt-on. Custom cutting, pipe routing, and performance exhaust clamps are required for installation. Because this model features notched neck extensions, it is optimized for clamp-in setups; standard band clamps can be used for assembly (clamps not included). For an un-notched neck version designed strictly for custom seamless weld-in applications, see Borla part number 401624.
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
