KPMI BLACK DIAMOND O/S INT. VALVE EVO/TWIN CAM `84-04 — Harley-Davidson Electra Glide Classic, Softail Heritage Classic, Softail Springer (1984-2017)

KPMI Black Diamond oversized intake valve for Evolution and Twin Cam V-twin engines, 1984–2004. Direct replacement for stock intake valves with oversized head design to improve port flow and scavenge efficiency.

Features

• Oversized intake valve head design
• Direct stock valve replacement
• Fits Evolution and Twin Cam engines

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-20915
• Length: 4.4 in
• Weight: 0.5 lbs

Fitment

Fits Harley-Davidson Evolution and Twin Cam V-twin engines from 1984 through 2004 model years.

Frequently Asked Questions

Will this fit my 2005+ Twin Cam engine?

No — this part is designed for Evolution and Twin Cam engines through 2004. 2005 and newer require a different valve.

Is this a direct bolt-in replacement?

Yes — the Black Diamond valve replaces the stock intake valve using the existing valve seat and guides.

What's the benefit of an oversized valve?

The larger head improves intake port flow and cylinder scavenging, which can increase volumetric efficiency at higher RPM.

Do I need to have my engine tuned after installation?

A professional should verify valve clearances and timing after installation to ensure proper engine operation.