---CNC machined flanges for strong, solid support and an accurate fit ---Designed to improve power and torque across the entire RPM range ---Free flowing to get the most from the 5 cylinder turbo powerplant ---Built in flexi joint helps reduce exhaust strain ---Sold for off-road / track use only Compatible with: Audi RS3 8P 2.5 TFSi 2011-2013 models Audi TT RS 8J 2.5 TFSi 2012-onwards models.