Supertech Nissan RB26 Factory Shim Replacement 12.15mm Diameter 3.05mm Thickness

This is a Supertech valve shim, specifically designed as a replacement for factory shims on Nissan RB26 engines. It measures 12.15mm in diameter and has a thickness of 3.05mm. 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 movement.

When rebuilding or tuning an RB26 engine, achieving precise valve lash is essential. These shims are made to factory specifications, allowing you to accurately set your valve clearances. Using the correct size shim ensures that your valvetrain operates smoothly and efficiently, preventing potential damage from incorrect clearances.