Curious, how does one replace the rubber grommets in the firewall without stripping out the wiring harness and threading those little buggers over the wire bundles? I know when one buys a new harness the grommets are built in, but that is before taping. I understand anyone wanting new grommets because even mine, which are relatively new, are showing stretch and some drying. One of the, if not the worse offenders for allowing water to seep into the floorboards, grommets are not perfect for sealing the firewall. I have resorted to laying butyl rubber from a caulk gun onto all of my grommets to seal them up. Pretty much undetectable and really water-seals the firewall.