Exhaust› Catalytic Converters

Integrated Engineering

ProCore 4.75" 200 CPI Catalytic Converter Downpipe

$2,199.99

SKU: IEEXCK9

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Integrated Engineering ProCore Downpipe is a high-flow exhaust component designed to improve exhaust note and flow for the Audi B9 A4 and A5. It features an in-house-engineered 4.75" 200 CPI catalytic converter with specialized coatings to clean exhaust gasses and align with factory ECU requirements, preventing check engine lights.

It offers a bolt-on, direct-fit installation without requiring cutting or welding. The design supports Stage 2 tuning and hybrid turbo power upgrades.
Show original supplier description
The iE ProCore Downpipe is a high-performance exhaust upgrade for the Audi B9 A4 and A5, engineered to significantly enhance exhaust flow and improve the exhaust note. At its core is a unique, in-house-designed 4.75" 200 CPI catalytic converter, featuring special emissions-cleaning coatings. This advanced design ensures compliance with factory ECU requirements, preventing the illumination of the check engine light even with significant performance modifications. Its high-flow design is capable of supporting power increases for Stage 2 tuning and hybrid turbo upgrades, unlocking the full potential of your vehicle's hardware and tuning. The ProCore catalyst's specialized coating cleans exhaust gasses, allowing it to pass vehicle readiness monitors without triggering error codes. The average installation time is estimated at 2-3 hours. This downpipe is compatible with stock and hybrid turbos, as well as stock or iE A4 Catback Exhaust Systems, providing access to maximum horsepower, torque, and spool potential. Dyno testing has shown significant power gains of up to 126 HP and 183 TQ over stock when installed on a Stage 2 equipped B9 A4, which included the iE Intake System, iE FDS Intercooler, and a Stage 2 tune. This downpipe is specifically designed for the Audi B9/B9.5 A4 and A5 models from 2017 to 2020.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandIntegrated Engineering
Part NumberIEEXCK9
CategoryExhaust
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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