A long while ago I was in the same boat. I went a local pawn shop and picked one up for $50. Fits perfect and is Snell 2000 approved which you will need to for the track. I put a Diablo sticker on it and it's great. I'd rather use my money on other things. No need for a $400 helmet.
i roll my motocross helmet when i'm at the track. HJC . cost about $150 at the bike dealership.been using it for years. i figure if its good enough to protect my melon when i'm launching off doubles and triples, its good enough for the drag strip.!!!!!!!!!! :biggrin: