so i have a 85mm bore block...my question is can i use a 85mm head gasket? i know your suppose to use .5 bigger than the bore but then i have people telling me 85mm will be fine and i cant find anyone that makes a 85.5.

 

You should use the 85mm.

 

i have no idea why using .5mm more will be better but if it was me , i will stick to 85mm . 85mm is huge , isnt it ?

 

Okay thanks