I installed one of those and it was a bit of a bear to get into place. I could not figure out what I was supposed to do with the giant plastic retainer pins.
I was definitely not willing to drill holes in the firewall for them to fit through. I used the stock retainer pins, but had trouble with lining up the pad since they needed to go through the middle of the semi-prepunched holes for the giant plastic pins. I suffered through it, but never again. I prefer the soft covers. Wish I had better news for you.
Maybe you can sell yours to someone who hasn't read this yet.
