Got a great engine? Sure you do. No engine is complete on its own, however: the engine is part of an intricate system that works as a team to provide your vehicle with great, trustworthy power. In the case of your 2005 Subaru Legacy, one of the most important components is your exhaust system. Why is your exhaust system so crucial? Simple. Your internal combustion engine relies on a steady supply of oxygenated air (via the air intake system) in order to make things happen as they should. These combustion processes themselves, however, then produce wastes: the air and fuel used in combustion do not simply disappear. These wastes must be disposed of, and this job falls to a Subaru Legacy Exhaust System. If your exhaust system is restrictive or inefficient, you’ll be unwittingly crippling your engine, as air will not be able to enter quickly and smoothly. In a great Legacy Borla Exhaust System, you can count on finding smooth pipe interiors (for low air resistance), mandrel-bent tubing (to eliminate the sharp turns that slow down air flow), and wide pipe diameters (to allow a large amount of air through at a time) - all features that combine to create huge exhaust flow. Auto parts buyers desire high quality information and support when shopping for good quality auto parts from us. Accordingly, we've established a 24/7 customer service hotline to address your questions. If you spot a better price somewhere else, give us a call - we will meet or beat any legitimate auto part price.