Weight is the enemy of all cars, it reduces acceleration, braking and steering. Anything we can do to get the weight of the car down will improve the performance of your Subaru all around. The Invidia Titanium Catback Exhaust replaces your heavy factory exhaust system with a featherweight full Titanium exhaust. With a straight through, high flow design, your Subaru will sound as good as it performs, allowing maximum power to be extracted from your engine. This is a proper racing exhaust for those looking for ultimate power and weight loss, nothing else comes close.