Yep, those have micro-grooves. Very nice! Make sure your machine shop sets the clearance between 0.0008" and 0.0012" when you use those, as the grooves will break in and add up to 0.0004" more on the skirts. Too much clearance invites poor skirt-to-oil-to-bore contact, and these pistons can then get too hot. With cast forged pistons, like the Wiseco, they are different alloys and need more clearance (0.0020") for other reasons, so don't confuse these with those.
Remember, too, that increasing the bore size while retaining the stock chamber size also raises the compression ratio quite a bit. These should work out at between 9.25:1 and 9.4:1, depending on whether you add a quench band to the head or not.
