Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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Just got a used engine with some kind of world products heads on it. Trying to figure out what they are, the number under the valve covers is I-025 it also has S/R cast into it. Any ideas what they are?