Improved Air Flow. These ported Ford Racing heads have an intake port volume of 202cc (stock is 174cc) allowing for an intake flow of approximately 272 cfm at .600" lift and an exhaust port volume of 73cc (stock is 62cc) allowing for an exhaust flow of approximately 190 cfm at .600" lift.
Fully Assembled. Leak tested prior to assembly, each Ford Racing Head comes fully assembled with factory steel guides, production springs, valves, retainers, locks, and seals. Does not include camshaft, followers, and hydraulic lash adjusters.
Recommended Upgrade. These ported heads can add over 50 rear wheel horsepower (SAE J1349)* when installed with a pair Ford Racing "hot rod cams" M-6550-3V on a stock valve train with the stock intake. *SAE J1349 is the most conservative and stringent testing standard used by Ford to certify power output.
Application. This Ford Racing CNC Ported Driver Side Cylinder Head is specifically designed to be a direct bolt-on performance upgrade for the 2005 to 2010 GT and Bullitt Mustangs with the 4.6L 3-valve V8 engine.
These heads will fit early 3V engines originally equipped with the "High thread" style 16MM spark plugs, but will require 2008-2010 12MM spark plugs and ignition coil upgrades.
Engines with late style 12MM spark plugs can be identified by coil engineering number 8L3E.
Engines with early style 16mm "High Thread" spark plugs can be identified by coil engineering number 3L3E.