Stainless Steel Rear Section (choose single or dual exhaust kit) Borla Performance Industries has released two great new performance exhaust systems for the fun 2008 Toyota Scion xB equipped with a 2.4L 4-cylinder engine, automatic or manual transmission. PN11757 is a rear section direct replacement for the factory system that installs using a factory flange after the muffler. This system flows 128cfm more than the factory unit which accounts for the mileage and performance gains. The system is 5.6db louder than the factory system, giving this little run-around some extra juice and a great sound. BORLA also offers a single exit rear section (PN11756) which is a direct replacement for the stock and is 9 db louder than the factory system. Both systems utilize the 3.5” oval, rolled edge polished stainless steel tips that are BORLA embossed. BORLA has a 3-decade tradition of building performance exhaust for Toyota products, from street & race trucks to the NHRA Sport Compact Champion Titan Motorsports record setting Scion. BORLA, the original pioneers of high quality, austenitic stainless steel (superior to 409 or aluminized steel) free-flow exhaust utilizes patented award and race winning technology to deliver quality, sound, performance gains and enhanced fuel economy -- all with an easy bolt-on installation. And backed by an unsurpassed written million-mile warranty.