The scavenger “puck” which installs on the oil filter housing is common to all Scavenger models except the RC101. Therefore if you are ordering for more than one model or buy a new bike you can order just the parts you need.
The RC110 and RC130 have fittings that stay on the bike so if you want to use one of these kits on more than one bike you would need to order a fitting kit for each additional bike. A supplement kit will give all parts needed to use an RC110 or RC130 if all you have is a puck from a different kit.
The RC120, RC 140 and RC160 have no parts that stay on the bike and one kit can be used on all the bikes, of the model it fits, you want. A supplement kit gives you all the parts needed to use a RC120, RC140 and RC160 if you have a puck from a different kit. So if you have more than one bike, and they are different models, you can order one full kit and one supplement kit for each of the other models.
The RC101 is the RC101 and no parts interchange with any other kits. One RC101 will work on all the EVO big twins you want with no additional parts needed. Bellow you can order any supplements kits.