I think these pipes are dirrected for the BB stroker dragracing and the cans may not have a sparky or not meet DBL requirements for those that have them. Why show pictures of a can that may not be beneficial to the general public. The dragrace guy that truly want to be the fastest really doesnt care what it looks like as long as it out performs the competition. At least that is my take on things. If they perform on a big engine like they have been shown to do, I could care what the can looks like as long as I am first to the finishline! Just my .02