Supertech VW 1.8L/2.0L 8V Black Nitrided Exhaust Valve - +2mm Oversize - Set of 4

In this set, you get four Supertech exhaust valves designed for VW 1.8L and 2.0L 8-valve engines. These valves are built to be 2mm larger than stock, which can help improve airflow into the combustion chamber when you're rebuilding or modifying your engine's top end.

The valves feature a black nitrided surface treatment. This process hardens the surface and makes it more resistant to wear and corrosion, which is important for exhaust valves that deal with high temperatures and exhaust gases. The +2mm oversize dimension means they are larger in diameter than the original valves, potentially allowing for a bigger valve seat opening and better cylinder filling, especially if you're porting the cylinder head. This is a common upgrade when aiming for improved performance from these VW engines.