With the B-Nova guide adapters, you'll be able to adapt a Slot.It guide to a Carrera or SCX car to get a better-performing guide and to be able to use high-quality wiring and copper braid.

B-NOVA universal guide adapter converts Carrera and SCX to Slot.It.  

Guide adaptors are precision machined from black ABS plastic, and are black in color.

Enough to do 2 cars.