Hello, I’ve been thinking about buying a Remus Cat Back for some time now, but then I’ve come across the Flappennauspuffanlagen. Topic on what’s allowed and what’s not allowed at Klappennauspuffanlagenhttps://www.tuningblog.eu/…/ orhttps://generationtuning.de/is-e-a-klappenauspuff-allows-tuev/ ———————————————————————————————————————— For more information: My Cupra 290 ST without Opf may still be the old Klappennauspuffanlagen on it do according to Friedrich Motor Sport. Answer by Friedrich Motor and Sport: thank you for your message. Your vehicle still falls under the old guideline and thus you can install the flap system without hesitation. If the flap is closed, the system is approx. 2db louder than the original system. In the video the system is mounted on original cat. —————————————————————————————————— Now to my questions: Do you find these systems here but worth without DB if the flap is open, does someone have more details here? Reaper flap exhaust system Leon ST 290http://www.dth-turbo.de/…/product_info.php?… JE-Design Duplex flap exhaust system from Kathttps://www.sportauspuff-versand.de/…-cupra-5f-endrohr-rund-esd.html 76mm duplex system with flap control https://www.streetbeastexhaust.de/…euerung-seat-leon-5f-st-cupra I get the right idea that these systems are defini Tiv are louder when flaps are on, than series then ? Since I still drive the model 2016. These should have EC approval. And which would you recommend? Newer models where flaps may not be louder like series does not really make sense any more in contrast to a sports exhaust. Hope to give it all right again. I am very happy about answers.