i have an ST170 bottom end with a blacktop head. I was quoted £144 for a 1.8mm genuine RS focus gasket from ford, or Pumaspeed do a 4 layer MLS gasket for around £70. Obviously it would be nice to spend less, but if there’s one that will out-last others, i would spend the extra, but also need the right CR.
Any advise before fore I buy either of these?
Cheers