Image: UbisoftOfficial screenshot from Ubisoft.
Furiously Fast needs ten parts installed on a single Ride, one of the four special cars. It follows on from Car Cry, so you will want at least one Ride and a pile of Ride parts first.
1. Get a Ride, such as Juan's Beaumont Valentina. 2. Collect parts, for example by finishing Gran Premio races. 3. Fit parts to that one Ride until it has ten. The trophy pops on the tenth.
Pick one car and put every part on it. Speed Racer and Car Cry also send you to the Gran Premios, so do all three together.