83.5mm Porsche 356/912 Big Bore Kit w/ Biral Cylinders & JE Forged Pistons "High Comp" 4340 4 Liter 911 engine

4 Liter 911 engine

5mm exhaust valves

240°/240° Duration

298 Duration

This is a new set of 93mm VW Type 4 or Porsche 914 cylinders

83.5mm Porsche 356/912 Big Bore Kit w/ Biral Cylinders & JE Forged Pistons "High Comp" 4340 4 Liter 911 engineThis is a new set 83. 5mm Porsche 356 912 JE High Compression pistons with Biralcylinders. It fits Porsche 356; C, SC, 1963 66 &Porsche 912; 1965 and Upwith the 3 piece case. The Cylinders are BiralwithJEForged pistons with 30 Angle. JEForgings are made from 2618 Aluminum, They have a 0 offset with extramaterial under the top for thevalve pocket, Biral Liners are a cast iron sleeve with aluminum fins, making them lighter and dissipate heat better.