Would personally prefer 400bhp as a limit but I'm happy with whatever tbh. I think 450bhp and you might limit the cars somewhat. I was looking at maybe using a 200-250bhp car tuned up to 400, but I'm not sure they'd make it to 450 fully tuned. Might mean we only get RX7s, Supras, Skylines etc. - unless that's what you want! It sounds good though, loads of potential cars to choose from.