IE Performance Catted Downpipe - Audi B9 A4 & A5

Tuning (stage 2) is required in order to remove the CEL.

NOT compatible with 2021+ model year engines equipped with a V-BAND style turbo to downpipe flange.

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.

• High flow 200 cell CAT
• Excellent power gains with matching Stage 2 Tune
• True 76mm without necking down to OE sizing at CAT
  
• Resonated design to keep drone to a minimum
  
• Cast sections ensure maximum flow
• Stainless steel and TIG welded for a gorgeous fit and finish
  
• Direct bolt-on fitment