Zrz-pinned Posted April 28, 2020 Report Share Posted April 28, 2020 I am going from 64mm to 66mm piston and cylinders. Can I still use the same stock cool head with the same domes or do I need to upgrade that too? Quote Link to comment Share on other sites More sharing options...
ginger Posted April 28, 2020 Report Share Posted April 28, 2020 you should be fine as long as just the piston diameter is changing, 66 is as big as you can go on factory cylinders etc unless you sleeve them. which then you would need to worry about the head. Quote Link to comment Share on other sites More sharing options...
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