Borla 08-12 BMW 328i Sdm E90 2.0L RWD Dual Left Rear Exit Touring Cat-Back ExhaustBorla 08 12 BMW 328i Sdm E90 2. 0L RWD Dual Left Rear Exit Touring Cat Back Exhaust System features polished T 304 stainless steel tips. BORLA(r) Cat Back(tm) & 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(r) Sound of Power respected by motoring enthusiasts everywhere. Each