For a street car that gets used on the track in solo racing (ie: time trials, etc.) what advantage is there to replacing the stock M030 and getting a full aftermarket suspension? Is it primarily the range of adjustability or something else? For example, my car has a M030 coil over suspension. It can change the ride height because it's a coil over set up and can change the stiffness of the shock absorber with the top dial. I also have new springs to replace the stock ones. So what can something like a Moton/Leda/KW set up do that the M030 can't?

 

M030 isn't valved for stiffer spring rates. You can get them rebuilt for a given spring rate range but at that point, you're getting into Moton/Leda/KW territory. And that's just the front.