Borla 400487 ProXS Universal Muffler 2.5" Dual In/Out w/ X-Pipe

Vehicle Fitment

• Universal fit for vehicles/exhaust systems with 2.5" exhaust piping - not vehicle specific

Features

• Borla ProXS™ universal muffler designed for custom exhaust builds
• Dual 2.5" inlet and dual 2.5" outlet configuration for balanced flow
• Internal X-pipe design helps harmonize exhaust pulses for richer tone
• Straight-through free-flow design for reduced backpressure and improved performance
• Reversible orientation for flexible installation layout
• Premium T-304 stainless steel construction for durability and corrosion resistance
• Oval body profile enhances exhaust flow characteristics
• Backed by Borla's Million-Mile Warranty

Specifications

• Part Number: 400487
• Series: ProXS™ Universal Muffler
• Main Pipe Diameter: Dual 2.5" inlet and outlet
• Muffler Body Size: Approx. 4" x 9.5" oval
• Overall Length: Approx. 19" (varies by orientation)
• Design: Dual in/out with internal X-pipe for tone harmonization
• Material: T-304 stainless steel
• Fitment: Universal (fits compatible 2.5" exhaust pipe)

Included Components

• 1x ProXS™ universal muffler (Borla 400487)

Product Description

The Borla 400487 ProXS™ Universal Muffler is a high-quality performance muffler engineered for custom exhaust systems or replacement applications using 2.5" exhaust piping. Featuring a dual inlet and dual outlet configuration with an internal X-pipe, this muffler helps reduce backpressure and harmonize exhaust pulse timing to produce a richer, more aggressive exhaust tone compared to many stock components. Its reversible design allows for flexible installation in a variety of exhaust layouts.

Constructed from premium T-304 stainless steel for long-lasting corrosion resistance and durability, the 400487's straight-through free-flow design enhances exhaust velocity and performance potential. Because it's a universal part rather than vehicle specific, this muffler fits various custom exhaust builds that match its 2.5" inlet/outlet size. Whether you're building a custom system or replacing an existing muffler, the Borla ProXS™ 400487 provides performance-ready sound and durability backed by Borla's Million-Mile Warranty.