Ford Crossflow Xflow Cylinder head Machining. Resurface all gasket faces and rocker mount. CNC machined guide bore for bronze guides and correct valve spacing. Offset guide bore machining available at an additional cost. Machine spring platform to provide correct spring installed height. Install and hone guides. Counter bore valve throat to 85-90% valve size depending on application. Cut valves to equal depth. 4 Angle valve seats. Hand port seat throat and bowl. Porting work is an additional cost and dependent on application. Contact number is in the last photo feel free to ask any questions. The item "Ford Crossflow Xflow Cylinder head Porting CNC Machining" is in sale since Monday,…