Borla 400436 ProXS Universal Muffler 3" Dual In/Out w/ Internal X-Pipe

Vehicle Fitment

• Universal fit for vehicles/exhaust systems with 3" exhaust piping - not vehicle specific

Features

• Borla ProXS™ universal muffler for versatile custom exhaust applications
• Dual 3" inlet and dual 3" outlet configuration for balanced flow
• Internal X-pipe design helps harmonize exhaust pulses and enrich tone
• Straight-through free-flow design for improved exhaust performance
• Reversible orientation for flexible installation layout
• Premium T-304 stainless steel construction for corrosion resistance
• Oval body profile for enhanced flow characteristics
• Backed by Borla's Million-Mile Warranty

Specifications

• Part Number: 400436
• Series: ProXS™ Universal Muffler
• Main Pipe Diameter: Dual 3" 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
• Material: T-304 stainless steel
• Fitment: Universal (fits compatible 3" exhaust piping)

Included Components

• 1x ProXS™ universal muffler (Borla 400436)

Product Description

The Borla 400436 ProXS™ Universal Muffler is a performance-oriented muffler designed for use in custom exhaust systems or as a replacement in setups with 3" exhaust piping. Featuring a dual inlet and dual outlet design with an internal X-pipe, this muffler supports improved exhaust flow and harmonizes exhaust pulse timing for a richer, more aggressive tone than many stock mufflers. Its reversible orientation allows for flexible installation in various exhaust layouts.

Constructed from durable T-304 stainless steel, the 400436 resists corrosion and delivers long-lasting performance. The straight-through, free-flow oval body enhances exhaust velocity and helps reduce backpressure. Because it's a universal component, this muffler fits a wide range of custom exhaust applications that match its 3" inlet/outlet size. Whether you're building a custom system or replacing an existing muffler, the Borla ProXS™ 400436 provides a performance-ready solution backed by Borla's Million-Mile Warranty.