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).