When tarmac based motorsports is the main focus for a vehicle, our Red Series is definitely the way to go. Being that they are a tailored package in terms of both spring rate and valving, we will make up your suspension set to suit your application as best we can. And as every motorsport orientated car should be doing testing, in the future if you wish to try any changes like spring rates, valving, etc, we are more than happy to help with that. When you go to place your order, just make sure to give us helpful information about the vehicle, it’s modifications and the type of motorsport it’s doing.