The IE Performance Catted Downpipe for the B9 Audi A4 & A5 is specifically designed to drastically reduce turbo backpressure and significantly shorten turbo spool time. This results in a more responsive turbo, which is crucial for the calibration of a Stage 2 ECU TuneThe combination of a performance downpipe and an ECU tune fully utilizes the performance potential of both the standard turbo and the engine. This results in an impressive power increase of no less than 97 hp over the standard figures. The high-flow 200-cell The catalytic converter, positioned as close as possible to the turbo, significantly reduces exhaust emissions and unpleasant odors while maintaining maximum flow for optimal performance. In addition, much attention was paid to the sound of the exhaust system. IE engineers opted to integrate a resonator into the system to refine the sound. This results in a much better exhaust sound than systems without a resonator, which often produce an unpleasant rasp when combined with the standard cat-back. The addition of the resonator creates a deeper and more pleasant tone without annoying drone noises on the highway, thus maintaining driving comfort. All sound recordings were made on a vehicle with a Stage 2 ECU tune, IE cold air intake and intercooler, with only the downpipe replaced and no other modifications made to the standard exhaust system. The IE Catted Downpipe is made entirely of thick-walled 304 stainless steel and is designed in-house using advanced digital scanning technology for a perfect fit.

Advantages:
• Significant power gains in combination with Stage 2 Tune
• No restriction to OEM dimensions at the catalytic converter
• High-quality castings for perfect fit and finish
• Placing the catalytic converter close to the turbo reduces emissions and odors

Contents:
• IE Catted Downpipe (76mm)
• 200-cell high-flow catalyst
• Resonator for sound tuning