Supertech VW 1.8T 20V 82.5mm Bore -4.5cc Dish 9.3:1 CR Pistons - Set of 4 (Excl Rings)

This is a set of four Supertech forged pistons specifically made for VW 1.8T 20V engines. These pistons feature an 82.5mm bore and a -4.5cc dish, which results in a 9.3:1 compression ratio when installed. This setup is ideal for builders looking to upgrade their engine's internal components for improved performance or to handle increased boost pressure. Forged pistons are known for their strength and durability, making them a solid choice for high-performance applications or when rebuilding an engine.

Supertech uses a high-strength aluminum alloy for these pistons, which is then forged into shape. This process creates a denser, stronger grain structure compared to cast pistons, allowing them to withstand higher cylinder pressures and temperatures. The 82.5mm bore size is a common upgrade for the 1.8T engine, often used when boring out the cylinders to refresh the engine block or to achieve a specific displacement. The -4.5cc dish is designed to work with the stock cylinder head volume to achieve the target 9.3:1 compression ratio, which offers a good balance between power and drivability, especially when running forced induction.

This set includes the four pistons, but please note that the piston rings are sold separately. You will need to purchase a compatible set of rings to complete the installation. It's also important to note that these pistons are not CARB approved and cannot be shipped to California. When rebuilding your engine, always ensure you follow the manufacturer's recommended installation procedures and torque specifications for optimal results.