ProXS Stainless Steel Exhaust Muffler by Borla. These mufflers include many of the features found on Borla’s performance mufflers, at a more affordable price. You get the same patented straight through muffler technology that reduces noise without restricting power, and the same austenitic stainless steel construction that’s backed by Borla’s one million mile warranty.

Features:

• Increased exhaust flow for better performance
• Deeper exhaust tone
• Patented straight-through muffler design reduces backpressure while absorbing sound waves
• Made from the finest austenitic stainless steel for long-lasting durability
• All welded construction
• Backed by the exclusive Borla Million-Mile warranty
• Proudly made in the USA
• T-304 stainless steel will never rust
• 100% welded construction for strength
• Free-flow design for improved performance
• High-temperature continuous-filament fiber (CFF) acoustic material for sound control
• Natural mill finish can be brushed or polished
• Reversible design for installation flexibility

The Pro XS is a value priced muffler designed to unleash more horsepower and torque from your engine while delivering the best sound quality. The patented straight through muffler design reduces restriction and increases exhaust gas velocity, making sure each cylinder is completely evacuated to make room for the incoming charge.This design absorbs the sound waves without disturbing the power waves, in contrast to the chambered mufflers used by most aftermarket companies. Chambered mufflers use partitions or baffles to subdue sound waves, which also creates backpressure and reduces power.

A ProXS muffler will have a deeper exhaust tone compared to a factory muffler of the same size. Since the sound absorbing capabilities of the muffler decreases proportionally with the size of the muffler case, a smaller muffler will be louder while a larger than stock size muffler will be quieter.

Borla uses austenitic stainless steel in the construction of the ProXS muffler, which contains high levels of nickel and chromium, to resist corrosion. Thanks to its construction, this Borla muffler features outstanding durability. This material is harder than the lower grade stainless steel used by the OEM manufacturers, yet is very ductile. Nevertheless, the increased hardness requires special equipment to form and bend. This Borla muffler contains a stainless steel perforated tube wrapped with several layers of stainless steel sound absorbing material and a layer of ceramic sound absorbing, high temperature material, all contained in a fully welded stainless steel shell.

Borla is so confident in the quality of this muffler that it’s guaranteed against defects in materials and workmanship for one million miles.