IE's Catback Exhaust System for your Audi B9/B9.5 SQ5 features our DroneTrap technology to deliver an enriched sound without the annoying drone. Our passion for design shines with cutting-edge engineering and manufacturing techniques, mandrel-bent, stainless steel, TIG welding, and multi-point reinforcements to deliver an aggressive and refined exhaust note from the turbo six-cylinder engine. NO CHECK ENGINE LIGHTCEL FREEWITH STOCK DOWNPIPE AGGRESSIVE SOUNDDRONETRAPWITHOUT DRONE COMPLETE EXHAUSTTRUE CATBACKDOWNPIPE BACK Delivers a sporty, deep, and enhanced exhaust sound Includes IE's proprietary DroneTrap resonance tuning system Replaces entire exhaust from downpipe connection back High-flow design to support any power goal 100% no-fuss bolt-in direct replacement, no cutting or welding Mandrel bent TIG-welded T304L stainless steel Reliable OEM-quality flex sections Leak-free exhaust clamps Reinforced multi-point boxed exhaust hangers for long life Stamped multi-wall center muffler Straight sections are reinforced and bridged for no-rattle operation Full kit includes all hardware and clamps for complete install Compatible with both sport and standard differentials IE's advanced DroneTrap technology captures the pulse waves responsible for your engine's exhaust note and draws them into a mathematically tuned resonator. The internal port is engineered to resonate these waves against each other in a process that selectively cancels out those responsible for annoying drones. The remaining waves produce the deep and enriched exhaust acoustics enthusiasts love. COMPLETE TRUE CATBACK IE's SQ5 catback includes all sections to replace the factory tailpipes, mufflers, resonators, and midpipes up to the downpipe. Enjoy an entirely new exhaust system that delivers an instant and perfect balance of flow and harmonics to your Audi S-class SUV. ADVANCED ENGINEERING Advanced 3D scanning tools and cutting-edge software provide our engineers with a high-resolution digital model of the SQ5 chassis. This data is then used to optimize the exhaust design for flow and performance utilizing all available space for the perfect catback design. TIG WELDED T304L STAINLESS STEEL A quality catback needs to sound remarkable AND stand the test of time. All piping is constructed of mandrel-bent T304L stainless steel to offer superior corrosion resistance. All joints are expertly TIG welded by hand using precise fixtures and tooling. We take great pride in knowing your new exhaust was built strong to last.