I did a track day, autocross and drag strip with these tires and had no issues. The events were my first time doing them so I don’t have a comparison to the stock setup or other tires.
I’ve been running 305/30/19 Michelin PS4 with 10mm spacers for a year now and they feel great. Lowered on H&R springs and no rubbing. A little spin in first gear but grips great afterwards (stage 2 tune). I also run 275/30/19 up front and the car feels planted.
I got the same error when I put the H&R springs on. Took it to the dealership to get the sensors re-calibrated and the message went away. I told the dealership I had a tune on the car and asked them to not do any updates. They respected the request and didn’t flash the car.
Warranty is 5 years per the Burger Tuning website but I don’t know if it’s transferable. It would seem seem they should honor any defects if the purchase date and manufacturing date were given. I had great support from them with install questions and the quality looks solid.
Installed one with 5% tint. It works great for blocking the sun and better than the little visors that are in the car. It seems to take up 25% of the windshield though but not enough to be an issue.
After I installed mine, I noticed a little noise on the left front when going over bumps. I had to re-tighten the shock nut using Allen wrench and box wrench. Noise went away and drives fine now with over 500 miles on them.
I have H&R on mine. spec said 1” drop on front and .75” on rear. Rears dropped more than I expected. Ride is a little stiffer but handling is much improved especially in sport mode. No more nose dives in corners at higher speeds.