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Valve cover: Polypropylene (PP) VS Aluminium

  • Polypropylene (PP)

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Discussion Starter · #1 ·
Does anyone know if there is an advantage to upgrading to an Aluminum valve cover or if there may be an OE Cover that may improve performance on a MR18DE engine(Z12 cube). Any insight would be great, thanks.
 

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Discussion Starter · #2 ·
So far, as far as I can tell, there is no effect on performance when it comes to valve covers, unless you are talking about weight. It appears that the only difference is cost or preference.
 
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