KPMI White Diamond Intake Valve - M8 1.571 STD — Harley-Davidson Road King, Road King Special, Electra Glide Ultra Classic (2017-2019)

KPMI White Diamond intake valve for Harley Milwaukee-Eight (M8) engines, precision-machined to OEM specifications for direct replacement without cylinder head modification. The 1.571 in standard valve seat diameter fits stock M8 heads.

Features

• 1.571 in standard valve seat diameter
• Precision-machined for M8 cylinder heads
• Direct OEM replacement
• 3.5 in length

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-21012H
• Valve Seat Diameter: 1.571 in
• Length: 3.5 in
• Weight: 0.2 lbs

Fitment

Fits Harley-Davidson Milwaukee-Eight (M8) engines with stock cylinder heads.

Frequently Asked Questions

Will this fit my M8 engine without modifying the cylinder head?

Yes. The 1.571 in standard seat diameter drops into stock M8 heads without modification.

Is this a direct OEM replacement?

Yes — KPMI precision-machines this valve to OEM specifications for Milwaukee-Eight engines.

Do I need new valve seats installed?

Not if your existing seats are in spec. Have a machine shop verify seat condition before installing new valves.

What's the difference between intake and exhaust valves?

Intake valves are smaller and operate at lower temperatures. Make sure you order the correct position for your application.