ProCore 4.75-Inch Downpipe

The Integrated Engineering ProCore Downpipe is engineered to enhance the exhaust system of your Audi B9 A4 or A5, delivering a significant increase in exhaust flow and an improved exhaust note. This performance downpipe features a unique 4.75-inch, 200 CPI catalytic converter, which is designed with a specialized coating to clean exhaust gasses and align with factory ECU requirements, thereby preventing check engine lights. Its high-flow design supports power upgrades beyond Stage 2 tuning and is compatible with hybrid turbochargers. The downpipe's design ensures optimal flow, allowing for the full power, torque, and spool potential of your engine hardware and tuning. The average installation time is estimated at 2-3 hours. This downpipe is compatible with stock and hybrid turbos, as well as the stock or Integrated Engineering A4 Catback Exhaust System. Power testing conducted on a Stage 2 equipped B9 A4, including the Procore Downpipe, iE Intake System, iE FDS Intercooler, and a Stage 2 tune, resulted in significant power gains of up to 126 HP and 183 TQ over stock. The iE ProCore Downpipe is specifically designed for the 2017-2020 Audi A4 and A5 (B9/B9.5) models.