GSC Power Division offers this intake/exhaust valve guide for Ford EcoBoost 3.5L V6 applications as a single unit with a +0.001 inch oversize outer diameter. The product description specifies the application and oversize dimension, presenting the guide as a direct replacement for the named engine family.
GSC P-D Ford EcoBoost 3.5L 6 Cyl Intake/Exhaust Valve Guide +.001in Oversize OD - Single