Join Date: May 2006
Location: Madison Heights, MI
They are production valves as delivered from Ford Racing.
From the Ford Racing website:
New production cylinder head castings
CNC ported to increase flow and performance
50.3cc combustion chamber
Intake flow increased appoximately 20%
Exhaust flow increased appoximately 30%
Assembled with production springs, valves, retainers, locks, and seals
Does not include camshaft, followers, and hydraulic lash adjusters
Minimize your vehicle down time waiting for a shop to port your heads. Get a brand new head for a little more than the price of exchange!
No exchange required
Requires 2005-08 "High Thread" design spark plugs
Note: Engines with late style 12MM spark plugs can be identified by coil engineering number 8L3E
Engines with early style 16mm "High Thread" design spark plugs can be identified by coil engineering number 3L3E part number.
They were on a car equipped with the Ford Racing cams, as well as other parts, and have been removed as the car has now been restored to original condition.
Again, please PM me if you have questions or are interested.