Thanks Cab I’m going to be using a set of CnC ported stealths i picked up.(new in the box never ran) Hughes built them,but I have no idea of what springs are on them,they do however have 10* retainers and locks which to me would indicate a high spring rate. I’m going to take them to my machine shop and have them checked out so i know exactly what is on them. The specs you gave me are pretty close to what i have found searching around. D