CTS Turbo B8/B8.5 Audi 1.8T/2.0T High Flow Cat is the premier high flow cat pipe for your Audi A4/A5/Allroad or Q5. \n \nOur B8/B8.5 High Flow Cat is designed to seamlessly fit in place of your restrictive stock catalytic converter; which is situated immediately after the turbocharger. Our B8/B8.5 High Flow Cat 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 of installing our B8/B8.5 High Flow Cat. Upon inspection you will notice a flare which is nearly 4"; this flare then tapers to 3" and is designed to allow for optimal flow as the exhaust gas transitions from the turbocharger to the B8/B8.5 High Flow Cat. In addition to being one of the best bang for the buck performance upgrades for A4/A5 owners; our cat pipe is also a very attractive piece. Each 3" B8/B8.5 High Flow Cat is mandrel-bent; hand tig welded. Do you need an additional 02 bung for data logging? Well; that's no problem! Extra 02 bung is now included at no extra charge. \n \nProduct Details: \n- 3" high-flow cat \n- T304 stainless steel construction \n- 200 cell stainless steel high flow cat \n- Mandrel-bent stainless steel \n- Fully tig welded design \n- Extra O2 bung for wide-band installation \n- Install hardware included \n- Great power upgrade \n \nTo 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! \n \nUse of stage 2 software upgrade is strongly recommended. \n \nFitment for factory turbo and CTS-TR-1070. \n \nFitment: \n

\n
• 2009 - 2016 Audi A4 2.0T
\n
• 2009 - 2016 Audi A5 2.0T
\n
• 2009 - 2016 Audi AllRoad 2.0T
\n
• 2009 - 2017 Audi Q5 2.0T
\n

\n

\n
• 1.8TFSI EA888 Gen 1 and 2.0TFSI EA888 Gen 2 ONLY!
\n
• Does not fit late ROW cars with EA888 Gen 3 engine.
\n
• Only fits LHD vehicles. Fits manual and automatic transmissions; does not fit CVT.
\n