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Prova Hi-press Bypass Valve - 15+ STI
Prova Hi-Press Bypass Valve
Increase the spring rate than the genuine products, it is a bypass valve to increase the pressure resistance performance.
A bypass valve opening pressure by improving about 20% pure ratio, improved turbo response, prevents the deterioration of fuel economy without upset the air flow sensor measuring the intake air amount and recycling recirculating into intake. You can also expected to dress-up effect of the engine room by the beautiful finish of black anodized aluminum.
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