This cockpit (code S09-SA1) fits under any Scalextric McLaren MP12-4C GT3 body (for example C3523). It is designed to replace the original cockpit, to leave space for Slot.it motor mounts, and parts. An alternative, and lighter, vacuum formed part, is available from Slot.it with code S09-XA1. Read the Shapeways Scalextric FAQ
for a suggested list of parts to be used with Scalextric models. This product is not a toy and it's only suitable for model makers of at least 14 years of age.