LEGO 42172 Technic McLaren P1LEGO Technic race car set for adults This McLaren P1 building set for adults is packed with authentic details and can be built to make a 1: 8 scale model collectible for supercar fans Build the V8 piston engine and more Enjoy a mindful project assembling all the details like the 7 speed gearbox with shifter drum, opening doors, adjustable rear wing and V8 piston engine A 1: 8 scale model car to display From the unboxing experience to the building