3.0L 12v - CIH The 3.0-litre twelve-valve closes the CIH line at the top: it is the largest capacity this architecture ever received, six cylinders, two valves per cylinder, and torque available very early. That is also what shapes a build, since cylinder filling and compression ratio become the real variables and the load carried by each piston climbs quickly. The offer here is limited to WOSSNER forged pistons for the 3.0 12v CIH. A well-chosen forged piston lets you raise compression without turning the block into a consumable.