Yes, but these can be used on either intake or exhaust. The timing dot on my GT500 is the exact opposite of the timing dot in instructions, so it's a source of confusion for me. The gear is not marked like the instructions either in that it shows degrees advanced or retarded. At this point I'm assuming that the retarded is in 2 degree increments clockwise of the straight up slot and advanced is the opposite. So if I wanted to install my intake cam 2 degrees advanced, I would put the key in that slot and line up the index link on the chain with the dot over the 8 degree retard slot. I'm looking for comfirmation if I'm looking at it correctly.
Can someone give me better instructions on how these work? The packaged instructions are worthless.