had a friend make these from an original I found stuck on a door in a warehouse. these are adhesive backed with a plastic cover, peel the backing, stick it on your drag car, pull the plastic cover. BAM!! 10 MPH faster!! $10 Broughers Speed Shop, same thing, $5 + shipping to the lower 48. thanks, mike roman (the junkyard pirate) it's $13 total to mail the PID sticker.