Yeah, my friend has a 99 FormulaZ 670, it's a pretty nice sled. It is a high performance sled, but mostly for haulin a$$ down trails. The rear suspension isn't much for being adjustable to race on the ice. FormulaZ, do you have to modify anything to stud this sled? I haven't looked at his sled in too much detail, but someone was saying theres no room for studs. I don't know if they mean at the bulkhead or in the tunnel. I'll try to look at my buddies this week sometime myself.FormulaZ said:I think it depends on the model of Formula. Mine wasn't built just for "cruisin".