There were no receipts kept that I know of. I didnt build the car but I am very familiar with the build. I did purchase the rotating parts. (crank, rods and pistons) The rest of the parts can be verified by just looking at them. If you are skeptical that the said parts may not even be on this car I would appreciate you look elsewhere for an evo. I dont have the time to entertain time wasters. This car is as advertised and is a smokin deal.