To be completely legal, you have to have a legit bill of sale for every part that affects the integrity of the VIN. We all ignore it basically because we aren't trying to cheat anyone and are just trying to fix, repair, and upgrade for our own uses. We are the minority though.So…how about when I do a frame swap and the vin stamped in the frame doesn’t match the dash plaque? The new fenders I got have a vin sticker on them…that won’t match the dash. Are they illegal too?