I just put on my SPL KTS coilovers yesterday. Compared to my TEIN/AGX setup, it can be waayyy stiffer. And I am running on 60 sidewall tires. It's 8k/6k with a 40mm inverted shock up front, and 49mm in the rear. I had an extra set of Cusco camber plates laying around my room and compared them to the KTS camber plates. WHAT A DIFFERENCE!!

The KTS ones are atleast twice as thick and look extremely beefy. I love them so far.