Audi A4 B9 2.0T Catless Downpipe to unleash hidden horsepower in a modern turbocharged engine is to upgrade the restrictive factory catalytic converter with a smoother, higher flowing unit. This is a great way to increase performance and add a nice growl to the exhaust note. Ideal performance is achieved through expelling exhaust gasses at maximum velocity through a larger internal diameter and a less-restrictive catalytic converter. We measured maximum gains of 10kw and +22nm of torque on our Audi B9 A4 when equipped with the MRC tuning Stage 1 ECU software.
Our High Flow Catalytic Converter and Downpipe utilises only premium materials and manufacturing techniques to deliver unmatched quality and reliability. Made of exquisite brushed T304 stainless steel and precision machined 10mm thick CNC-Cut T304 stainless steel flanges. New gaskets, bolts, and copper flanged lock nuts are included for a no-hassle install. Each weld joint is hand TIG welded for precision and strength and eye-catching beauty. The stainless steel oxygen sensor bung is TIG welded in the OE location so no extension harness is needed.
- Aftermarket ECU software is recommended to maximize performance gains as advertised.
- This product will cause a MIL (Malfunction Indicator Lamp) on factory stock tune.