Supertech Mitsubishi 4B11T 86.5mm Bore 33.3mm Comp Height -4.6cc Dish 9:1 CR Pistons - Set of 4

Supertech pistons are manufactured from extruded high silicon, enhanced 4032 alloy that features low thermal expansion, excellent wear resistance, and higher thermal conductivity. A phosphate dry lubricant coating is applied to pistons to protect against ring micro welding and enhance skirt lubrication. They are forged from enhanced 4032 alloy and CNC machined, featuring contact reduction grooves and honed & reamed pin bores for precise fit. These pistons offer high tensile strength and evenly distributed hardness, capable of withstanding up to 42psi of turbo boost with alcohol without problems. The manufacturing process involves 2 or 3 forging steps, yielding a fine structural grain oriented in fibers in the same direction of the stresses. Wrist pins are constructed of cold extruded chrome moly steel for high strength, to be used with wire clip locks. Quality control is performed after every step of the manufacturing process in climate-controlled environments to ensure reliability of dimensions. Rings, wrist pins, and wire locks are included (though one retailer noted rings are sold separately).