BRAND NEW DINAN FREE FLOW AXLE-BACK EXHAUST SYSTEM, 304 STAINLESS STEEL, POLISHED TIPS, COMPATIBLE WITH 2011-2016 BMW 550I DINAN FREE FLOW AXLE-BACK EXHAUST IMPROVES EXHAUST FLOW BY REDUCING BACK PRESSURE, RESULTING IN INCREASED POWER OUTPUT AND A GREAT SPORTY SOUND THAT IS CIVILIZED WHEN YOU WANT IT TO BE AND PLEASANTLY AGGRESSIVE UNDER HARDER ACCELERATION WITH ZERO DRONE. 100% STAINLESS STEEL CONSTRUCTION AND EXACTING SPECIFICATIONS ENSURE THAT THE SYSTEM FITS CORRECTLY USING THE FACTORY HANGERS AND WILL RESIST CORROSION. A VACUUM CONTROLLED BUTTERFLY VALVE IS UTILIZED TO IMPROVE FLOW AT WIDE-OPEN THROTTLE WHILE KEEPING THINGS CIVILIZED AND "DRONE" FREE THROUGHOUT. THE DESIGN REDUCES OVERALL WEIGHT AS WELL AND FEATURES 3.5 POLISHED TIPS FOR A TASTEFUL HIGH-PERFORMANCE LOOK. COMPATIBLE WITH: BMW: 2011-2016 550I 2011-2016 550I XDRIVE FEATURES MORE POWER: + 10 HP WHEN COUPLED WITH ENGINE SOFTWARE DRONE ABATEMENT TECHNOLOGIES USED TO REDUCE CABIN RESONANCE ENJOYABLY LOUDER, SPORTIER SOUND QUAD 3.5" LASER ENGRAVED, POLISHED EXHAUST TIPS 100% 304 STAINLESS STEEL CONSTRUCTION USES THE FACTORY BRACKETS AND HANGERS FOR A FACTORY-LIKE FITMENT SPECS: MATERIAL: 304 STAINLESS STEEL MAX HP GAIN: 10 PRODUCT TYPE: AXLE-BACK EXHAUST SOUND LEVEL: MODERATE / AGGRESSIVE SYSTEM TYPE: AXLE-BACK YOU CAN VIEW AND DOWNLOAD THE COMPLETE ASSEMBLY INSTRUCTION BOOKLETS FOR THIS EXHAUST SYSTEM HERE.
