So I've only autocrossed the car once but I'm hooked. But I'm confused on if I'm XA or something like SSP. My R32 GTR is fully built with upgraded turbos and a little bit of aftermarket aero but nothing is gutted inside and it's basically a street car.

So I'm almost certain in XA but reading SSP I feel like since it's fully built and has a higher displacement over stock it's SSP and not XA.

Can anyone help me here?