Borla ProXS Muffler 400490, 2.5-Inch Offset Inlet and Outlet, Oval Stainless Steel

The Borla ProXS Muffler part number 400490 is a universal performance muffler designed for exhaust systems using 2.5-inch piping. It features offset inlet and outlet connections, a compact oval body, and a reversible design that provides installation flexibility. Notched necks support easy clamp-on installation with compatible 1-inch-wide band-style clamps, sold separately. This muffler is suitable for a variety of custom exhaust applications and is not restricted to off-road use.
Constructed from premium T-304 austenitic stainless steel, the Borla ProXS Muffler delivers excellent corrosion resistance and long-term durability. Its fully welded construction adds strength, while the free-flow design helps support improved exhaust performance. High-temperature continuous-filament fiber acoustic material provides effective sound control while maintaining the performance-focused character associated with Borla exhaust components.
The muffler features a natural mill finish that can be brushed or polished before installation for a customized appearance. Its single offset inlet and single offset outlet connect to exhaust tubing with pipe-style connections. Made in the USA, the Borla ProXS Muffler 400490 is backed by Borla’s Million-Mile warranty, reflecting the brand’s focus on quality, durability, and performance. Professional installation is recommended to ensure proper alignment, clearance, and secure connection.
This product carries a California Proposition 65 warning. Welding, brazing, thermal cutting, or other fabrication operations involving the product may expose users to chemicals including chromium, nickel, cobalt, arsenic, cadmium, and lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.