These six cylinder heads were made from 2024 aluminum billet. CNC machined. Will fit 911 or similar engine configuration

Titanium valves. Bronze guides. Machined for internal oil seals.

Intake Valve Diameter : 52.83 mm

7mm stems

Exhaust Valve Diameter: 41.9 mm

7 mm stems

Chamber diameter 94 mm

Barrel Counter bore diameter 144.6 mm

Ran on a Dyno engine only to prove them.

In addition, 4 more billet cylinder heads in various states of condition/completion can be included optionally ; except for shipping costs . Last 5 pictures depict these.