E85

to be honest i can't remember... i think the foam is ok just not the bladder, if made of rubber. i helped in the pits on a friends car that ran straight alcohol and we had to get all the alcohol out of the system and then poured WD-40 and ran it on that for a minute so nothing got messed up but E85 is no where as potent.

probably look it up online or call summit and ask if they carry a cell for alky or not.