Supertech Nissan RB26 Factory Shim Replacement 12.15mm Diameter 4.00mm Thick

Starting with a 4.00mm thickness and a 12.15mm diameter, these Supertech shims are made to replace the factory ones in your Nissan RB26 engine. When you're rebuilding the top end or just doing a valve adjustment, getting the valve lash set just right is critical for performance and engine health. These shims are designed to fit precisely where the stock ones came out, making the adjustment process straightforward.

Supertech makes these shims to be a direct replacement, meaning they'll drop right into place without any modification needed. This ensures that you can get your engine back together with the correct valve clearances. Having the right size shims is key to making sure your valves open and close at the proper times, which helps your RB26 breathe and perform as it should.