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Not only does the 0FG have the ability to accommodate dual 4
The Boss improves handling
direct replacement constructed from high quality materials
For GT w/ T-Slot Adapter
SPE Motorsport Titanium Valve Spring Retainers For 2011-2026 Ford 6.7L Powerstroke 2006-2016 BMW Z4 Not only does the 0FGThe SPE Motorsport Titanium Valve Spring Retainers are a precision engineered upgrade for the 2011 2026 6. 7L Powerstroke manufactured from heat treated aircraft grade 6AL4V titanium and designed specifically for high horsepower, high RPM applications. These retainers are 35% lighter than the factory steel retainers, which directly reduces valvetrain mass at high RPM. Less mass means upgraded valve springs can mitigate valve float more effectively,
