No, I am having 9.5 comp with the custon pistons, also if you look on how most piston companys rate compression ratios with heads they are usually rated with the pistons .008 in the whole and the TRW pistons have for valve releafs, using a head gasket of about 45 thousands. My gaskett is 37 thousands compressed and like I said I have custom piston made up to get the compression of 9.5 to 1 and I said that my slugsd were .005 in the hole but they relly close to being a 0 Deck height.
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