Ready, set, BUILD the track of your dreams with Hot Wheels Track Builder Unlimited. The Track Builder Unlimited Split Track Pack is a part of the BUILD category and allows for awesome multi-car play with 2-into-1 transitions and premium straight track. Kids can create a 4-to-2-to-1 elimination race right out of the box! The Split Track Pack is one of 7 different component packs that let kids BUILD, STUNT, and BOOST. The BUILD category enables kids to create dynamic track paths in their Track Builder world. Connects to other Hot Wheels sets (sold separately) for infinite possibilities. Add to other packs in the STUNT and BOOST categories for even more fun or add this stunt to Multi-Lane Speed Box or Triple Loop Kit (sold separately).