Integrated Engineering ProCore Downpipe - Audi A4/S4/RS4 B9

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This Integrated Engineering downpipe replaces the restrictive factory item directly after the turbocharger, where exhaust flow matters most. Opening up this section lets the turbo spool sooner and breathe more freely at high load, and it's one of the most effective single upgrades on a tuned car.Features Replaces the restrictive factory downpipe Improves turbo spool and high-load flow Direct bolt-on to factory hardware Stainless steel construction Specifications Brand: Integrated Engineering Product Type: Downpipe Part Number: IEEXCZ2 Vehicle CompatibilityB9 S4Please confirm fitment against your vehicle before ordering. Contact us if you need help selecting the right part. Show more