500 sx head mod?

[ragerider]

I'm thinking about doing the head mod on my 99 500 sx which layer or layers of gasket do I remove? any pros or cons to this I dont mind running 93+ fuel

 

[terret725]

take eitehr the top or bottom later nad reuse it, make sure its free of dirt and rust when u put it back on. i usaly cover it with a thin coat of antiseeze to make sure it seals good but thats just me.