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The CTS B5 A4 1.8T test pipe is the premier test pipe for your B5 Audi A4 1.8T. Our test pipe is designed to seamlessly fit in place of your restrictive stock catalytic converter, which is situated immediately after the turbocharger. Our test pipe features 3″ stainless steel piping, smooth mandrel bends, two 02 sensor bungs with an option for a third. Substantial power gains, improved exhaust flow and a more throaty sound are the main benefits from installing our test pipe. Upon inspection you will notice smooth mandrel bent piping with seamless transitions from the turbocharger to the exhaust system. In addition to being one of the best bang for the buck performance upgrades for A4 owners our test pipe is also very attractive piece. Each 3″ test pipe is mandrel bent, hand tig welded. Do you need an additional 02 bung for data logging? Well that’s no problem! An additional 02 bung is included at no extra cost.
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Product Details:
To remove the CEL that will occur, proper tuning software must be used. CTS Turbo recommends choosing a High Flow Cat for the sake of our environment!
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Use of stage 2 software upgrade is strongly recommended.
You'll get an instant confirmation email with your part details and invoice. We source from a network of authorized suppliers across the country, so lead times vary by brand and part type — we'll send a tracking number the moment your parts move.
Made-to-order builds — carbon fiber bodywork, fabricated systems, custom finish work — run longer than off-the-shelf items because they're built per order. You'll get progress updates throughout the build.
Need a specific timeline on a part before you buy? Call 805-267-9762 or hit the chat — we'll check vendor stock direct and give you a straight answer.
Absolutely! Once your order ships, you'll get an email with a tracking link so you can follow its journey from our shop to your doorstep.
If your order ships via freight, you'll get a separate email with a direct link to the carrier's tracking page — easy and stress-free.
Things happen on the road — even to boxes. If your order arrives damaged, snap a few clear photos of the box and product and send them our way right away.
If your shipment is lost, just email or call us — we'll help track it down and guide you through the next steps to make it right.
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