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Supertech valve shims sold as Nissan RB26 factory replacements feature a 12.15mm diameter and 2.90mm thickness. Provided for valvetrain adjustments on RB26 cylinder heads, these shims allow technicians to set correct valve clearances by substituting measured shim sizes to achieve proper lash without altering other engine components.
Supertech Nissan RB26 Factory Shim Replacement 12.15mm Diameter 2.90mm Thickness
