AA Bare 2.0 Porsche 914/912E Head Casting. Build the performance Head of your needs. It Comes bare with out Seats or Guides. Giving you the the ability to build any possible combo Stock or Street head you want. The AA 2.0L casting comes with the STD Porsche 2.0L combustion chamber. The STD Porsche 2.0L Spark Plug angle. Also equipped with a breather pipe and all the studs

The head temp sensor boss is there but not tapped

Please Note: The Exhaust Guild Hole is the same as the Intake 12mm, We did this to give you the ability of running different Valve and Guide Combo's. As it sits it will take the 12mm intake guides when running 8mm stainless steel valves, Or the Guide Hole can be bored to except the 13mm Type 4 guides or 15mm Porsche Guides when running the stock sodium filled valves. 

Exhaust Port: Round