[quote author=Jonny Hotnuts
I would rather use an SFI rated block as mentioned by wolcottjl from BSCI but I cant find any info about the sheet on their site.
Thanks all.....
-JH
[/quote]
Call BSCI Matt Ray and talk to him. Phone number on their site. I purchased a 5" thick block several years ago and he provided SFI sticker of 45.2
It is essentially the same as the roll bar pad they produce. (the hard stuff)
I used that material for rear and side padding for my head and first lined the cage area with 6061 Aluminum. Some deformation "can" occur, but just enough to take energy out of the impact.
I still carry though a couple of extra sticks of BSCI roll bar pad, just in case an inspector requires more protection. :=d
Rick Byrnes