Supertech Subaru STi 99.5mm Bore 8.2:1 CR Coat Pistons- Set of 4 (Use SWF20068-0) (Excl Rings)

This set includes four Supertech forged pistons, each measuring 99.5mm in bore diameter and featuring a 8.2:1 compression ratio. These pistons are specifically designed for high-performance Subaru STi engines, offering a robust solution for engine builds where increased durability and power are key objectives. They are constructed from forged aluminum, a material known for its strength and ability to withstand the higher pressures and temperatures found in performance applications.

The 8.2:1 compression ratio is a notable feature, indicating these pistons are intended for use with forced induction setups, such as turbochargers or superchargers. This lower compression ratio helps to prevent detonation or pre-ignition under boost, allowing for more aggressive tuning and higher power output. The forged construction provides a significant advantage over cast pistons, offering improved resistance to fatigue and deformation under extreme stress. This makes them a solid choice for rebuilding or upgrading the engine in your Subaru STi, especially if you plan on pushing the limits of its performance.

It's important to note that this set does not include piston rings, which will need to be purchased separately. Additionally, these pistons are not CARB approved and cannot be shipped to California. Always consult your engine builder or a qualified mechanic to ensure these pistons are the correct choice for your specific build and to follow proper installation procedures.