Herb

Where can this be purchased and how benificial is it?

WVZR-1

This I assume is for LT mounts? I can point you likely to a couple how to ..... if yes

I've never done either but both are quite responsible enthusiasts.

Boss Lady

I had DOCO Insulators, who does our work offshore, fabricate 2 replacements for me. Their number is 337-981-0399. I forget the measurements, but it was something like 5" x 6" x 5" tall. Since they came on the car and I'm running headers, I figured it would be best to replace them. Not 100% sure if needed, but they can't hurt.