Hello, I have Cayman Base 2009 And It comes without Sport Exhaust. I went to dealership and I asked to retrofit they want to charge me 4600$ In total, So they won't touch the dashboard I asked them without retrofitting the PSE button, They said It's not possible and It could harm the engine to keep the valves open. I'm not convinced.. Would u recommend me to go for it with dashboard button (Things will be the same after that or I'll hear some cracky sounds from dashboard) What should I do In my situation ?