As me and my tech observed the head gasket there where small chunks of it burned I mean so small I was buggin that it even matered. I think the NOS had nothing to do with it and he says it does!!!! I will post pic's later today and you guys tell me what you think!!! Gene Lui said he ran a 50hp shot of NOS on his stage 1 and never had any promblem's and my motor is fresh !! There is no wear what so ever!!!!