Quick view Cobb | sku: 515140 Cobb 3" Titanium Catback Exhaust For 11-21 Subaru WRX/STI 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... $2,225.00 Add to Cart Compare