Supertech VW 1.8T 20V 83mm (+2) CH 32.7mm -4.5cc Dish 9.6:1 CR Piston - Set of 4 (Excl Rings)

This is a set of four Supertech forged pistons specifically made for the VW 1.8T 20V engine. These pistons are designed to replace your stock ones and are sized at 83mm, which is a +2mm overbore from the factory specification. They feature a dish volume of -4.5cc, resulting in a compression ratio of 9.6:1 when installed in the correct application. This setup is ideal for rebuilding or upgrading the engine in your 1.8T 20V equipped Volkswagen.

Supertech uses a high-strength forged aluminum alloy for these pistons, which is much more durable and resistant to detonation than cast aluminum. The forged construction allows them to handle increased cylinder pressures and temperatures often found in modified or performance-oriented 1.8T engines. The specific dish design and compression ratio are carefully calculated to work with the 1.8T 20V cylinder head and valve configuration, aiming for a balance of power and reliability. These pistons have a 32.7mm compression height (CH), which is the distance from the wrist pin center to the piston crown. This measurement is critical for ensuring correct valve-to-piston clearance and proper deck height when installed.

This set includes the four pistons, but please note that piston rings are sold separately. You will need to source the correct ring set for these 83mm pistons. It's important to ensure your engine block is bored and honed to the exact 83mm specification before installing these pistons. Proper installation, including correct ring gap and assembly, is crucial for the longevity and performance of your engine build.