Supertech Nissan 240SX KA24 89.5mm (0.5+) -27cc Dish 8.6:1 CR Piston - Set of 4 (Excl Rings)

Supertech forged pistons for your Nissan 240SX with the KA24 engine. This set is for a 89.5mm bore, which is a 0.5mm oversize, and features a -27cc dish to achieve a compression ratio of 8.6:1. These pistons are designed to handle increased cylinder pressures and temperatures often found in modified or performance-oriented engines. They are sold as a set of four, but remember they do not include piston rings, so you'll need to source those separately.

Forged pistons like these are built from a solid block of aluminum alloy that's heated and hammered into shape under extreme pressure. This process creates a much stronger and more durable piston than cast ones, making them ideal for engines that see hard use or are built for more power. The specific dish volume and bore size are carefully calculated to work with the KA24 engine's cylinder head volume and stroke, helping to achieve the target compression ratio. This setup is a popular choice for builders looking to increase displacement and improve the engine's ability to breathe and make power.

When installing these pistons, it's crucial to ensure proper clearances and ring gap settings according to Supertech's specifications. Because these are an oversize piston, the cylinder bores will need to be machined to match the 89.5mm diameter. It's also important to note that this part is not CARB approved and cannot be shipped to California. Always consult your engine builder or a qualified mechanic for specific installation advice and to ensure all necessary components, like rings and bearings, are accounted for in your build.