KPMI White Diamond Intake Valve - M8 1.630 OS — Harley-Davidson Road King, Road King Special, Electra Glide Ultra Classic (2017-2019)

KPMI White Diamond intake valve for Milwaukee-Eight (M8) engines with oversized 1.630 in stem diameter and thermal-resistant coating. Engineered for high-lift cam profiles and OEM-replacement flow characteristics.

Features

• White Diamond heat-resistant coating
• 1.630 in oversized stem diameter
• Designed for high-lift M8 cam applications
• OEM-specification flow characteristics

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-21009H
• Stem Diameter: 1.630 in
• Length: 3.5 in
• Weight: 0.2 lbs

Fitment

Fits Harley-Davidson Milwaukee-Eight (M8) engines with high-lift cam profiles requiring oversized intake valves.

Frequently Asked Questions

Will this fit stock M8 cam profiles?

This valve is engineered for high-lift cam applications. Verify with your cam manufacturer before ordering for stock-lift setups.

What is the White Diamond coating?

A thermal-resistant surface treatment that improves heat dissipation and extends valve life under aggressive cam profiles.

Is this an OEM Harley part?

No — KPMI manufactures this to OEM specifications as a direct replacement for Harley M8 intake valves.

Do I need to adjust anything when installing this valve?

Installation requires precision engine work. Ensure proper valve clearance and seat contact during reassembly.