This is a brand new (Set of 2) Stage 2 Port and Polished High Performance Cylinder Heads for a Porsche 914 2.0L or Type 4 Bus/ Porsche 1.8L. Made from an AA 2.0L 914 type 4 casting with breather or AA 2.0L Bus Square or Round port using 8mm valve stems. Heads comes with stainless steel 50mm intake and a stainless steel 40mm exhaust valves, with harden keepers, chromoly retainers, and dual high rev springs. They are ready to install.

The heads can also be opened to 103 to accommodate the larger bore sizes. 

Engine: Porsche 914 2.0L / Type 4, Bus Porsche 1.8L

Springs: Dual High Rev

Valves: 50mm Intake by 40mm Exhaust

Casting: AA 2.0L or AA 914

Plug Size: 14mm (Replacement Bosch Number is W8CC or NGK is B5ES.)

Exhaust Port: Square or Round

Bore: 103 works with 103, 104, & 105mm Kits

Please Pick Bore size, and Spring Upgrade when ordering Above