I ordered 20 of the plastic clips today, they peaked my curiosity. The skeptic would say if they worked well, why did GM not continue using them on other applications and eliminate the metal clip, heat Distortion in summer, plastic deterioration, couldn't take the stress of those Hi Performance 69 Z28's
Sauron, I looked at the web-site for Aveco apparently the now own W&E. They only sell to Distributors. I maybe in touch after I receive the plastic clips.
Thanks for the responses Paul