BORLA® Cat-Back™ and Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA® Sound of Power respected by motoring enthusiasts everywhere.
Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer-controlled CNC manufacturing ensures an accurate fit.
Best of all, BORLA® stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.
2006 BMW E90/ E91 325i/ 325xi 3.0L 6 Cyl. Automatic/ Manual Transmission Rear Wheel & All Wheel Drive 4 Door/ 2007-2011 BMW E90, E91 328i/328xi 3.0L 6 Cyl. Automatic/ Manual Transmission Rear Wheel & All Wheel Drive 4 Door.