Looks like this might be a possible product to use on the engine bay side of the firewall?

http://www.designengineering.com/pro...sp?m=sp&pid=27
http://store.summitracing.com/defaul...=egnsearch.asp

Anybody else have luck with other materials.

 

What!? I can't hear you over the Cummins!

 

I'm glad you posted that...been thinking about that in the back of my mind as I see all of the new trucks with that from the factory...been on my mind for a while...sometimes it just gets annoying driving down the road...thanks!

Brian