Oil Orifice — Intake Rocker Shaft

Oil Orifice — Intake Rocker Shaft

This oil orifice installs in the cylinder head and meters oil flow through the intake rocker shaft. It’s a calibrated restriction used to control top-end oiling, helping maintain proper lubrication where it’s needed while managing oil volume and pressure within the valvetrain.

During head service, rocker shaft work, or engine rebuilds, this orifice can be lost, damaged, or clogged. Ensuring the correct orifice is installed is critical for proper oil distribution and long-term valvetrain reliability.

Manufactured to factory specifications for precise oil flow control and correct fit in the rocker shaft/cylinder head assembly.

Details

• Cylinder head oil metering orifice

• Intake rocker shaft application

• Controls valvetrain oil flow and distribution

• Precision-calibrated factory component

Factory Part Number: 12250-PR3-000