Cam gears work great and the fact that they adjust in 5 places is perfect (Less probability of slippage). What I did not like is that it has cam timing marks and they are NOT in the correct place. Due to this I installed the intake 180deg out of phase and took me a while to figure out what was wrong. Had to mark both cams using the OEM cams to be able to align them properly. I understand not bothering to make two different cam gear teeth sections but don't put timing marks on them and add that limitation to the instructions... No instructions either so that was fun!