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  1. Performance Modifications
    Hi all! I have a 2zz Spyder that needs a headgasket replacement and I intend to go turbo before the summer. Heres my thinking and I would like someone to correct me if I am wrong. Cause the high compression ratio on the 2zz stock is 11.5:1 it cannot take much more than 8psi. So to gain more...
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