IE ProCore Downpipe For Audi B9 S4 & S5

The IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow. Our in-house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and larger turbochargers. The specialty tri-core design and precious metal coatings align with ECU emissions requirements so that you can upgrade without the check engine light. IE PROCORECEL-FREENO CHECK ENGINE LIGHT HIGH-FLOW6" 400CPSICATALYTIC CONVERTER SUPPORTS STOCK & HYBRIDTURBOCHARGERS