CTS TURBO B9.5 AUDI A4/A5/Q5 40TFSI/45TFSI HIGH FLOW CAT (2021-2025)
Free up your 2021-2025 B9.5 Audi A4/A5/Q5 40TFSI/45TFSI 2.0T’s potential with the CTS Turbo High-Flow cat. This high flow cat downpipe is specific to the B9.5 facelift platform which uses a V-band style connection at the turbocharger, making it a perfect fit for the 40 TFSI or 45 TFSI Hybrid models. 3.5″ diameter stainless steel piping with a high-flow catalytic converter is matched perfectly to a billet v-band flange, allowing for optimal flow as exhaust gases transition from the turbocharger to the rest of the exhaust system. Substantial power gains, improved exhaust flow and a more sporty sound are the main benefits from installing the CTS downpipe. Our friends at Boost Dynamic Tuning created the best Stage 2 file for this Simos 19.7 EA888.4 platform. CTS Turbo + BDT stage 2 combo is the best bang-for-the-buck performance upgrade for B9.5 40TFSI/45TFSI owners. Now available with end-user at-home tuning. Please see the link below for the compatible software tuning options: Boost Dynamic Tuning Stage 2 for Audi A4/A5 45TFSI Boost Dynamic Tuning Stage 2 for Audi Q5 45TFSI Product features Designed using the latest 3D prototyping technology for perfect fit into factory location High-flow catalytic converter Large 3.5″ stainless steel piping, billet stainless steel flanges Flanges are fully welded inside and out Welded stainless steel mounting bolts for easy installation (saves you a lot of time) New gasket and copper lock nuts are included, if you wish to renew the turbo gasket: 5Q0253115C Not recommended for crackle/aggressive overrun tunes Compatible with factory or aftermarket cat-back exhaust systems To remove the CEL that will occur, proper tuning software must be used. CTS Turbo recommends Boost Dynamic Tuning. Fitment (for Borg Warner turbocharger 06N145702D): 2021-2025 Audi A4 2.0T 40TFSI/45TFSI (B9.5) 2021-2025 Audi A5 2.0T 40TFSI/45TFSI (B9.5) 2021-2025 Audi Q5 2.0T 40TFSI/45TFSI (B9.5) INSTALLATION GUIDE BY BOOST DYNAMIC TUNING