This is the 1/4" closed-cell foam used on the firewall and etc. All firewall foam and foil purchases come with a diagram of what thicknesses go where.  We do not precut the foam or foil since we don't know what you are REALLY going to do with it! Save what you've got for patterns 'cause we don't have any!  Not eligible for free shipping, shipping  $25.

For the complete, original firewall you will need two foam kits 1/2 inch and 1/4 inch - Part Numbers P49/22 and P49/23 and the Firewall Foil P49/20.