do they whistle when driven at freeway speed? something to check. please keep me in the loop as you work to produce them.
I can't answer for the ones being made, but if they are the same as the original as they look to be, then NO.
I put some on my 74 years ago and have never heard any noise. I also have them on a couple of other trucks and no noise with any. My OBS have a pair that were made for a different type truck and even those don't make any noise. Yeah, I guess you could say I'm a fan.