GAS Downpipe Set, B8/B8.5 S4/S5/Q5/SQ5 3.0T Supercharged

GAS high-flow downpipes are built completely with T304 stainless steel for high strength, corrosion resistance, and longevity. These downpipes remove the small front resonators (sometimes mistaken for secondary cats), allowing your engine to breathe through larger 2.5" piping and smooth transitions. In addition to increased sound (15-20% louder), expect power gains as high as 15HP to the wheels depending on tuning and hardware. Although our Version 2 pipes were tried and tested on the B8 platform, we weren't quite satisfied with "good enough" Version 2 - Improved fitment and ground clearance, new flex joint position for improved access to downpipe nuts, v-band joints for adjustability, and an added option for resonators or high flow GESI 300 cell cats for emissions reduction. Version 3 - Improved ground clearance for Resonated options based on client feedback! Our downpipes feature: Improved sound Increased engine response Power increase of 10-12 HP on an otherwise stock vehicle V-ban