The COBB Titanium Cat-Back Exhaust is un-matched in build quality, style, and performance. Utilizing Grade 4 titanium tubing, this cat-back offers high corrosion resistance and protection from impacts. Back purging ensures quality welds that will not fail due to contamination. The entire system uses slip-fit connections, allowing for a wide range of adjustment. Blued titanium tips add a distinct touch and offer adjustability. Best of all, this complete system weighs in at 24lbs assembled, nearly 50% lighter than it's stainless steel counterpart. The COBB Titanium Cat-Back Exhaust for your 2011+ Subaru WRX or STI offers premium styling and quality. Other titanium cat-backs can produce a certain 'tinny' exhaust note, however, the build quality of this system provides a refined note more akin to traditional COBB Cat-Back Exhaust Systems.