Is it ok to copy a W5 head and make it better or are we just mad at Speedmaster

Just don’t put any MoPar, Chrysler or Chrysler corp. part number symbol or logo on the part your copying and you can go to town.

Once you put one of the above on the part, you could be in big trouble.

If a little guy to a big corp makes a tail light from a basic, ugly poor quality copy or just a simple part that looks similar to an exquisite reproduction, as long as the part is devoid of the above, there good to go and sell without repercussions.