IE B9 A4 & A5 Performance Catted Downpipe

LEADING FEATURES Excellent power gains with matching Stage 2 Tune Cast sections ensure maximum flow Stainless steel and TIG welded for a gorgeous fit and finish True 76mm without necking down to OE sizing at CAT High flow 200 cell CAT for full power and reduced pollutants Tuned resonator keeps highway drone to a minimum Direct bolt-on fitment FEATURES INSTALL & FITMENT The IE B9 A4 & A5 Catted Downpipe is engineered to completely reduce turbocharger back pressure and increase turbo spool required for the calibrations of a stage 2 ECU tune. The combination of a performance downpipe and ECU tune together unlocks the full performance potential of your stock turbocharger and engine, delivering 97 horsepower over stock. Get ready to experience addictive power gains across the entire RPM range and an aggressive exhaust growl you are bound to love. ADVANCED SOUND TUNING IE engineers elected to use a resonator in the B9 A4 &