what is this?

[91ka]

the part that's stuck to one of the cam

http://i.ytimg.com/vi/BO4o12A6Tmo/mqdefault.jpg

[Sileighty_85]

need to be more speciffic. Are you talking about the Cam angle sensor or the HKS V-Cam setup

[racepar1]

The sensor on the front of the exhaust cam is the cam angle sensor. On CA's and RB's, that's where it's located.