This is a new set of 84mm Porsche 911 2.2/2.4L High compression pistons with Biral cylinders. The Compression ratios are 9.1:1 with the 66mm crank and 9.7:1 with the 70.4mm. The Cylinders are Biral with Graphite Coated Hypereutectic pistons with valve pockets, and the 22mm Pin. 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: Hypereutectic

Dome Height: 13mm

Compression: 9.1:1/9.7:1

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

Part # 008 911 84S