GSC P-D Nissan TB48DE Stainless Steel Exhaust Valve 34.50mm Head (+1mm) - Set of 12

If you're rebuilding the top end of a Nissan TB48DE engine, these GSC Power Division stainless steel exhaust valves are a solid option. This set includes 12 valves, each featuring a 34.50mm head size, which is 1mm larger than stock. This slight increase in head diameter can help improve airflow into the combustion chamber, potentially leading to better engine performance.

These valves are constructed from stainless steel, a material known for its strength and resistance to heat and corrosion, which is crucial for exhaust components that experience high temperatures. The +1mm sizing is a common modification for tuners looking to extract a bit more power from the TB48DE. They are designed to fit directly into the factory valve guides, simplifying the installation process for a mechanic familiar with engine rebuilds.

When installing these, ensure your valve guides are in good condition and properly sized for the slightly larger valve stems. This set is intended for a complete engine rebuild, so make sure you have all other necessary components like valve springs, retainers, and seals ready.