If it seals, great, don't worry about change the cylinder.
If it don't seal at first, put some telfon tape around the cylinder head and try again. Normally only 1-2 circles, unless you are using super thin telfon tape, then you may need more.
If that still don't seal (not very likely on SHS cylinder head, the only time I seen this was with a crappy stock cylinder head from some crappy brand), then trash the cylinder head because that is the problem, not the cylinder.
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