3.0T 200 CPSI Performance Cast Downpipe

The Integrated Engineering IEEXCK3 performance cast downpipe is engineered as the ultimate solution for your Audi B9/B9.5 S4 or S5 3.0T. It is designed to provide the turbo and engine with a completely unrestricted exhaust flow path, supporting Stage 2 ECU tunes and hybrid turbo upgrades. This downpipe features a massive 6" investment cast body that transitions smoothly into dual 2.5" downpipe legs, constructed from 304 stainless steel and hand TIG-welded for superior reliability and a premium finish. Key features include a high-flow 200 CPSI catalytic converter, which allows for unrestricted power while reducing emissions and eliminating unwanted smells. The thick-wall investment cast body also reduces radiant heat, helping to keep the engine bay and charge air cooler. This downpipe is designed to be a direct bolt-in factory replacement, with an estimated installation time of around 2 hours, requiring no welding, cutting, or permanent modifications. For optimal performance, this downpipe requires Stage 2 or hybrid turbo ECU tuning. It is specifically designed for 2017-2024 Audi S4 and S5 models equipped with the 3.0T engine. IMPORTANT CONSUMER NOTICE: This is a motorsport/racing product. Integrated Engineering, LLC makes no representations or warranties regarding compliance with applicable emissions laws.