Salut les gars! Thanks for the welcoming
Well the cat removal cost 2 to 3 times cheaper than a genuine cat converter. Besides, it usually moves the torque curve to higher rpm, especially on this engine. The torque lost down is given back on the top, perfect for track usage. It would solve my problem and fit well with a gr.N complete exhaust.
By security I would anyway change also the ignition coils, lambda and IAT sensor as the OBD gives me both failure codes, even after a reset.
I know each country has different tolerance towards emission controls that's why I ask. France is pretty flexible with emissions. I never passed any STK in CZ, I heard from friends that it can pass without a cat, it all depends on the center where you go, if they're strict or not, if they know you, if your kids go to school together etcetc