They are the same as the Comp Polymer, I ran them for about 2 years and at the very end they started to leak. You need to use cork gaskets with a very thin layer of RTV and they will not leak. If you use the stock re-enforced gaskets they will leak, no or not.
As for the stockers, you need to grind away the oil baffle to get them to work with the 1.7's, it is a lot of grinding.
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