Borla ProXS Muffler - Notched Neck (400478) 1806 Your best dollar-per-horsepower investment by

Your best dollar-per-horsepower investment by far

HPS cool ram cool air intake is a convenient way to change your intake in case of rainy days where water might be inducted into your cold air system

Bilstein's unique piston design offers greater sensitivity and superior vehicle control

The faceplate is double sided with Boost PSI on one side and Fuel Pressure PSI on the other

Borla ProXS Muffler - Notched Neck (400478) 1806 Your best dollar-per-horsepower investment byBorla ProXS Muffler; Center Offset; 2. 25 in. Center Inlet; 2. 25 in. Offset Outlet; 14 in. x 4 in. x 9. 5 in. Oval Body; 19 in. OAL; Notched; T 304 Stainless Steel;. (400478) Borla ProXS mufflers are designed for the professional installer and custom installations. ProXS mufflers are made from high quality T 304 stainless steel for sharp appearance and long life. The straight thru design coupled with our continuous filament fiber (CFF) acoustic