Ha. Yeah 315's and gears feel fast. I liked that for sure. that goes away with the 37s but it still feels peppy in comparison to stock with 315s. I just installed the yellow box Speedo correction unit. Works great for the $. Easy to install. Def need it to help the shift points that get thrown off without any correction. 37s and no correction was off by 6 mph to fast ion Speedo.