3" High Flow Cat

The CTS Turbo 3" High Flow Cat is engineered as a direct replacement for the restrictive factory catalytic converter on Audi B8/B8.5 1.8T and 2.0T vehicles. Constructed from T304 stainless steel with a 200-cell high-flow cat and fully tig-welded mandrel bends, this component significantly improves exhaust flow, leading to substantial power gains and a more throaty exhaust note. This high-flow cat is designed to fit factory turbos, as well as CTS-TR-1070, CTS-TR-1070X, and CTS B8 BOSS kits. Installation hardware is included. To avoid a Check Engine Light (CEL) that will occur with this part, proper tuning software, such as a stage 2 software upgrade, is strongly recommended. Fitment is specific to the EA888 Gen 1 (1.8TFSI) and Gen 2 (2.0TFSI) engines. It does not fit late ROW cars with the EA888 Gen 3 engine. This catalytic converter is only compatible with Left-Hand Drive (LHD) vehicles. It fits manual and automatic transmissions but is not compatible with CVT transmissions. Vehicles confirmed to fit include the 2009-2016 Audi A4 2.0T (FWD and Quattro), 2008-2016 Audi A5 2.0T, 2012-2015 Audi Allroad 2.0T, and 2009-2017 Audi Q5 2.0T.