This is a new set of 86mm Porsche 911 2.2/2.4L High compression JE Pistons with Biral cylinders. The Compression ratios are 10.5:1 with the 66mm crank and 11.2:1 with the 70.4mm. 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: 2.2/2.4L

Stroke: 66/70.4mm

Cylinders: Biral.

Pistons: JE 2618 Forged

Dome Height: .450

Compression: 10.5:1/11.2:1

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

Part # 008 911 86S JE