first off, what type of porting are you looking at getting?? if its a drag port, i would reccomend getting some cub cylinders, they would be ready out of the box, you can get them already setup for 4mm stroke.. for the cost of having stockers resleeved, ported and bored, it would be more cost effective to get a set of cubs if you are looking for a drag style port.. plus you will get more power.. if not a drag port, i would suggest just a set of stock bore cylinders ported for 4mm.. for the money its not worth getting a set of stockers resleeved.. just my .02