Exhaust› Exhaust Pipes, Systems and Components

Integrated Engineering

3" Catted Downpipe System

$649.99

SKU: IEEXCG1

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 IEEXCG1 is a 3-inch catted downpipe designed to add horsepower and torque. It features 1/16" thick 304 stainless steel piping and a high-flow 200 cell per inch metal matrix catalytic converter. The downpipe bolts directly onto the stock turbo flange and includes a 3" to 60mm adapter for easy integration with the stock exhaust system.
Show original supplier description
The Integrated Engineering IEEXCG1 catted downpipe is engineered to enhance the performance and sound of your Audi 2.0T B8 A4, A5, or Q5. By allowing the turbocharger to flow more freely through its 3" diameter, high-flow 200-cell catalytic converter, and mid-pipe, this downpipe unlocks significant horsepower and torque gains, particularly when paired with a Stage 2 or K04 turbo ECU tune. Expect an aggressive motorsport exhaust sound and improved responsiveness throughout the entire RPM band. Constructed from 1/16" thick wall 304 stainless steel, the IEEXCG1 is designed for a perfect fit, achieved through in-house digital scanning. It features a machined turbo flange for a leak-free seal and long gasket life. The high-flow race catalytic converter is positioned close to the turbo to maximize flow and performance without excessive emissions or unpleasant smells. For added durability, the flex sections are TIG-welded and liner-reinforced to prevent common failures found in lesser aftermarket systems. Installation is designed to be straightforward, requiring only standard hand tools and typically taking 2-3 hours without the need for permanent vehicle modifications. The kit includes all necessary mounting hardware, such as nuts, bolts, clamps, and gaskets. This downpipe is compatible with both stock and upgraded K04 turbochargers. It is important to note that this downpipe does not fit the A5 8T due to RHD issues related to the steering knuckle.

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 NumberIEEXCG1
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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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