Ok I was way wrong. Greg our track manager sells J&J engine diapers. This is the link to the company but on the bottom you will see a note recommending using a Kevlar diaper if it’s near headers. You may have to call to get that option. If you Google search this company you will get more info. You can see from my pictures how thin they are and they hold up great. I buy extra absorbable clothes from summit and Amazon so I can change them out. Engine Diaper - NHRA Approved - JJ Performance