Description
Unlock exceptional performance and sound from your Audi B9 A4 with the IE ProCore Downpipe, engineered to deliver massive exhaust flow increases, an aggressive exhaust note, and compatibility with Stage 2 and hybrid turbo builds—all without triggering a check engine light.
At the heart of this system lies IE’s proprietary 4.75” ProCore 200 CPSI catalytic converter, featuring advanced precious metal coatings to clean emissions while maximizing flow. This means you can enjoy the full power of your modifications while maintaining emissions readiness—no CEL, no compromises.
Key Features:
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ProCore Catalyst Technology – Advanced rare-metal wash coats maintain emissions compliance with zero check engine lights.
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Massive Flow Capacity – Supports beyond Stage 2 performance and hybrid turbo builds.
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Rich, Aggressive Sound – Enhances the factory exhaust note with deeper tone and increased volume.
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Direct Bolt-On Fitment – No cutting, welding, or modifications required; fits stock or IE exhaust systems.
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Premium Construction – Crafted from 304 stainless steel, TIG-welded, and investment cast for maximum durability and thermal efficiency.
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Dyno-Proven Gains – Delivers up to 126 HP and 183 lb-ft of torque gains (with full IE bolt-on Stage 2 setup).
ProCore Catalyst Advantage:
Unlike traditional high-flow cats that sacrifice flow for emissions compliance, IE’s ProCore Catalyst uses a low-restriction 200 CPSI core with an advanced rare-metal wash that scrubs emissions while supporting full turbo efficiency. This enables it to pass emissions readiness monitors and avoids check engine lights—all while supporting serious horsepower builds.
Precision Engineering & Fitment:
Using high-resolution 3D scanning and CAD modeling of the B9 A4’s 2.0T engine bay, IE ensures a factory-like fit with optimal clearance, smooth exhaust transitions, and seamless compatibility with OEM and IE cat-back exhausts.
Power You Can Feel:
When tested on IE’s in-house dyno in a Stage 2-equipped Audi A4 (IE ProCore Downpipe, IE FDS Intercooler, IE Intake System), the ProCore downpipe delivered consistent gains of up to 126 horsepower and 183 lb-ft of torque over stock.
Easy Installation:
Designed for DIY and professional installs alike, the ProCore Downpipe bolts on using factory mounting points with no cutting, welding, or permanent modifications. All necessary hardware is included.
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Install Time: Approx. 2–3 hours with basic tools
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Emissions Note: Designed to pass readiness monitors and avoid CEL (Check Engine Light) on most setups
