Cobra mounts don't then bolt to Sparco seats apparently? Or so i've read. It's a gamble buying a set to see if they fit.
I've decided the cobra xlow frames are s**t tbh. They bolt up OK to the car, but it looks like a blind man has done the welding.
Couldnt you just drill the cobra mounts to fit the seats instead of adding seat height with another peice of metal under the sidemount?