500 Series Type 1 Head "Bare/Bare" H-beam and around the intake ports

and around the intake ports forincreasedHP and over all cooling

Stroke: 71mm stroke pistons

Part #008 911 84EP

Part #008 11 86C JE

500 Series Type 1 Head "Bare/Bare" H-beam and around the intake portsAA 500 Series Bare Casting, It is set up to build the performance Head of your needs. It Comes bare with a 12mm plug hole, and with out Seats orGuides. Giving you the the ability to build any possiblecombo Street head you want. The 500 Series Castings come STD with: Cleanflowingcooling vanes, formaximumcooling through the head, and around the intake ports forincreasedHP and over all cooling. Amodernized Combustionchamber, for increased head flow &