Supertech Nissan RB26 Factory Shim Replacement 12.15mm Diameter 2.60mm Thickness

This is a Supertech valve shim designed as a direct replacement for factory shims on Nissan RB26 engines. It measures 12.15mm in diameter and has a thickness of 2.60mm. Proper valve clearance is crucial for engine performance and longevity, ensuring the valves open and close at the correct times relative to the piston's position.

When rebuilding or tuning an RB26 engine, setting precise valve lash is a key step. These shims allow you to accurately adjust that clearance. Supertech makes these to factory specifications, so they fit right into the valve train assembly without modification. Having the correct thickness shims on hand means you can dial in your engine's valve timing for optimal operation.