Please note when expanding from 2 - 4 lanes and using a lap counter, all cars will need to pass thru lanes 1 and 2 (w/the black box or control unit) in order for the laps to register. You can take a look at the 3rd and 4th image to view the expansion.
Used with permission, Copyright 2020 Carrera Toys. Copyright 2020 Brey Corp. t/a Hobby Works
$6 Flat Rate Shipping. FREE Over $199* Most Orders