AMC Bare 1.8 Casting Type 4 Aircooled "Round" Port,  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 1.8L casting come With a breather pipe, Slightly larger combustion chamber over the 2.0L castings, and still set up with smog holes.

Exhaust Port: Round