1. Excellent
Wow!!! Vortex 2.0 gold chain sprocket kit. I recommend highly if you want to upgrade. I went one tooth down in front and 2 up in the back. Had it installed and wow!!! I was like a little kid at Christmas when I took my 06 gsxr 600 for a spin to try my new sprockets and had a smile from ear to ear with the torque and take off power difference it has. I completely recommend it !!!..