Borla ProXS Muffler 400487, 3-Inch Center Inlet to 2.5-Inch Dual Offset Outlets

The Borla ProXS Muffler, Part Number 400487, is a universal performance muffler designed for exhaust systems with a single 3-inch center inlet and dual 2.5-inch offset outlets. Its reversible design provides installation flexibility and allows the muffler to be used in configurations with a single inlet and dual outlets or dual inlets and a single outlet, depending on the overall system layout. Notched necks support easy clamp-on installation with compatible 1-inch-wide band clamps, which are sold separately.
Constructed from high-quality T-304 austenitic stainless steel, this 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 without restricting exhaust flow. The natural mill finish may be brushed or polished before installation to complement a custom exhaust system.
The oval muffler body measures 4 inches high by 9.5 inches wide with a 19-inch body length and a 23-inch overall length. It features a single center pipe inlet, dual offset outlets, and performance-grade construction for universal exhaust applications. For clamp-on installation, use compatible Borla band clamps; clamps are not included. Borla Part Number 400487 is made in the USA and backed by Borla's Million-Mile warranty. This product carries a California Proposition 65 warning related to potential exposure to chemicals during operations such as welding, brazing, or thermal cutting.