Gently used set of six twin plug cylinder heads for 911 3.3L turbo models.
These cylinder heads have the port floor welded up, and also twin plugs drilled. See pictures for more detail.
Cylinders head # K1926F.
Valves measure 49mm intake, 41.5mm exhaust.
Intake port 32mm, exhaust port 39mm.
911 3.3L Turbo, 1978-89
930 104 341 2R