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Exhaust› Exhaust Pipes, Systems and Components

Integrated Engineering

ProCore Downpipe

Name: ProCore Downpipe
Brand: Integrated Engineering
SKU: IEEXCZ2

$2,667.49

SKU: IEEXCZ2

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$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Integrated Engineering IE ProCore Downpipe is a performance exhaust component designed for the Audi B9 SQ5 3.0T. It features a high-flow 6-inch 400CPSI catalyst to support increased power and improve the exhaust note. Constructed from T304L stainless steel with TIG-welded joints, this downpipe is engineered for a direct, bolt-on fit without cutting or welding.

Show original supplier description

The Integrated Engineering IEEXCZ2 ProCore Downpipe is engineered to enhance the performance and sound of your Audi B9 SQ5. Designed with a focus on high flow, this downpipe supports upgraded hybrid and large turbochargers, unlocking greater power potential. It features IE's specialized ProCore Catalyst with a tri-core design and advanced coating, ensuring it meets vehicle readiness monitors without illuminating the check engine light. The downpipe is crafted from T304L stainless steel with investment casting and hand TIG welded joints for superior strength and a leak-free fit. This component boasts a high-flow, 6-inch, 400 CPSI catalytic converter that maintains optimal exhaust flow, crucial for maximizing gains from turbocharger upgrades. Real-world dyno testing on a hybrid turbo-equipped B9 S4 confirmed significant power gains of 45 HP and 41 ft-lbs to the wheels. The factory heat shield and engine cover can be reinstalled for a stealth appearance, with an estimated installation time of 2-3 hours. The product's advanced 3D scanning and software engineering ensure a perfect, factory-like fitment. This downpipe is compatible with the Audi SQ5 B9 (2018-2024) 3.0T engine.

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

Brand	Integrated Engineering
Part Number	IEEXCZ2
Category	Exhaust

Videos

B9 S4 - Integrated Engineering - Downpipe Install

I Dyno Tested Integrated Engineering's Downpipe for an Audi B9 S4!!!

IE B9 S4 & S5 Downpipe VS. Stock Downpipe Sound Comparison

Integrated Engineering Downpipe & Midpipes Exhaust Sounds - Audi B9 S4

Building The Perfect B9 A4 | Episode 2

IE B9 S4 & S5 Midpipe VS. Stock Midpipe Sound Comparison

How To: iE Anti-lag Launch & Rolling Launch Control Audi B9 S4, S5, SQ5, RS5

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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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