Tires. I went out and put new tires on my Challenger. The Pirelli’s never impressed me, but I figured I would wear them out since they were paid for. As you all know they spin on command and certainly are not inspiring. Now I live in the heart of Orange County California, where I can’t go fast unless I go looking for a place, but my main fun with the Cat is when the road opens up and I get to do 40-120mph pulls. I also don’t go to the drag strip. I do, however know a few good canyon roads that are a little fun. So at 12000 miles I put on a set of stock size Kumho Ecsta PS91s. After a quick 150 miles I will say for someone who drives like me, consider this a recommendation. Quiet, mostly sticky and not a bad price for four installed at $825