Supercars worth up to $650,000 each could be produced in NZ from next year if the initial public offering of Hulme Supercars is successful.

The track operator said it was unfair to call Kaikohe Speedway a "black track" - an unlicensed track not registered with Speedway NZ.

A replica Ferrari 250GT Spyder California sportscar used in the hit 1980s teen flick Ferris Bueller's Day Off will go under the hammer in Britain next month.