Supertech Nissan GTR VR38DETT Inconel Exhaust Valve- +1mm Oversize - Set of 12

If you're rebuilding the top end of your Nissan GTR's VR38DETT engine, especially for high-performance applications, you'll want to consider these Supertech Inconel exhaust valves. These aren't your average valves; they're built from Inconel, a superalloy known for its incredible strength and resistance to extreme heat, making them ideal for the demanding environment inside a high-output engine. The +1mm oversize design means they offer a larger sealing surface, which can help improve compression and overall engine efficiency when paired with appropriate machining.

Supertech has a solid reputation for producing well-built engine components, and these valves are no exception. The Inconel material is crucial because exhaust valves endure the hottest temperatures and highest pressures in the combustion chamber. This material choice helps prevent valve distortion, cracking, and premature wear, even under sustained high-RPM operation or aggressive tuning. The +1mm oversize feature is a specific choice for tuners and builders looking to maximize performance by ensuring a perfect seal after cylinder head work. This set includes 12 valves, enough for a complete engine rebuild.

When installing these valves, ensure your cylinder heads have been properly machined to accept the +1mm oversize diameter. It's also a good time to inspect and replace your valve guides and seals. These valves are designed to work with the specific geometry of the VR38DETT engine, aiming for a direct fit into the prepared cylinder head. Always refer to the manufacturer's installation instructions for precise details on fitting and break-in procedures.