fixinit Member 114 4 Phoenix, AZ Dec 9, 2016 #1 Not sure where to put this tip. But if you're drilling into your firewall and want the grommet to fit, drill .25"+ more than your insulation diameter. It's not science or physical condition. It's math - and I'll share from my mistake. Click to read more...
Not sure where to put this tip. But if you're drilling into your firewall and want the grommet to fit, drill .25"+ more than your insulation diameter. It's not science or physical condition. It's math - and I'll share from my mistake. Click to read more...
