We have been manufacturing these aluminum Packard V12 cylinders heads for over 10 years. They are available in either standard or high compression configuration. You can also choose the 14mm or 10mm spark plug size. See the video for the whole manufacturing process.
Mark Clayton
Clayton Restorations, Ltd.
Current Production Run Sold Out
Ernie Foster has taken this project over. Although we are still doing the CNC machining at Clayton Restorations, please contact him in regards to orders. 213-709-7258