CTS Turbo is proud to announce our proprietary high-flow downpipe for 2018+ Audi 8V RS3/8S TTRS with 2.5L TFSI EVO (EA855) engine. \n \nThis stainless steel high-flow downpipe that allows the user to remove the restrictive factory "main catalytic converters". This downpipe is a part of our modular exhaust system and it is compatible with factory or CTS Turbo mid-pipes. \n \nWe used CAD simulation to streamline the flow of exhaust gasses and ensure that it splits evenly into two outlets. Many hours of R&D were spent to ensure perfect fit; smooth exhaust flow and excellent sound. \n \nUnfortunately; the Check Engine Light will come on after the installation; we strongly recommend using "stage 2" software because the CEL deletes or emulators are not compatible with these cars. \n \nFeatures: \n- Large 4.0" downpipe outlet splitting into dual 2.5" pipes \n- Durable 304 food-grade stainless steel \n- Laser cut flanges and precision machined v-band \n- Factory-like placement of O2 sensors \n- Designed using the latest 3D scanning technology \n- Exhaust flow simulated with CAD software to ensure optimal flow routing \n- Perfect fit with factory or aftermarket mid-pipes \n- Aggressive sound - really makes that 2.5T scream \n- No drone under normal driving conditions \n- Optional driveshaft removal tool available separately \n \nFitment: \n- 2018+ Audi RS3 2.5T EVO (EA855) \n- 2018+ Audi TTRS 2.5T EVO (EA855) \n \nTo remove the CEL that will occur; proper tuning software must be used. \n \nUse of stage 2 software upgrade is strongly recommended. \n \n