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The stock compressions in the is300 2jzge vvti is 10.5:1. Can I still run stock ECU with no issues (check engine light) if I lower the compression to 10.0:1? I do not mind a slight power loss. It is hard to find forged pistons @ 10.5:1 compression @86.5mm.
 

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2002 Lexus IS300
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