This is a new set of 81mm Porsche 911 2.0L High compression JE pistons with Biral cylinders. The Compression ratio is 9.5:1 with the 66mm crank.  JE Forgings are made from 2618 Aluminum, They have a 0 offset with extra material under the top for the valve pockets. Biral Liners are a cast iron sleeve with aluminum fins, making them lighter and dissipate heat better. This kit requires no machine work, when installing in factory Porsche case & heads

Engine size: 2.0

Stroke: 66

Cylinders: Biral.

Pistons: JE 2618 Forged 

Dome Height: .460

Compression: 9.5:1

Kit includes: 6 Cylinders, 6 Pistons, A set of Piston Rings, and 6 wrist pins and clips.

Part # 008 911 81S JE