My engine just fresh rebuilt so I'm still on the break- in period, we probably going to do another tune and see what else or how much more we can extract. Botti is the man.
Just find yourself a good Germany local car service center and let them handle your car or find yourself a good tune shop that will take care of your car. I'm lucky myself that there is a local tune shop that did all my service and also tuned my car.
It sound like your end link is popping when you turn. I have to change my to SPL and linked to stop the noise
It's almost sound like you're end link, I have a similar noise too and I swap my handling to spl and the noise gone.
This wheels is directly made for our car I believe the front is 19 x 10 and the rear is 19 x11 but don't quote me on this, the reason why I believe it is because it doesn't need any spacer for the wheel. And yes 305 is perfectly fit for the rear I'm running 305 x35 x19