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Reduced wind noise
Perfect Fit
Intake Horn Gasket
Decreased Coolant Temperatures
04-10 Duramax HSP Billet Valve Covers Fuel Reduced wind noiseOur billet valve covers are designed to give your engine a clean, sleek look. They feature a 1 2" NPT port in the center of the cover to optimize crank case ventilation. They are made from 6061 T6 Aluminum, and they incorporate an O Ring to eliminate the need for messy silicone. It is recommended to run these valve covers with our forward facing thermostat housing, for there are no provisions to mount the factory hardware to upper valve cover. Our
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