Does anyone have any experience with these? I'm wondering if it might be a good compromise to allow me to keep the spring rates that I have (which I like) but allow me to bump up the spring rate for autocross days.
Any pros/cons of using them? Are they allowed in STX? Does anyone make them specifically for my KW V3 coilovers? I've never used them before, so I'm just looking for input.
To clarify, this is what I am referring to:
