KPMI Black Diamond Intake Valve - HD Sportster 1970-1983 — Harley-Davidson Sportster 1000, 1000 Roadster, Sportster Sixty One 1000 (1972-1983)

KPMI Black Diamond intake valve for Harley-Davidson Sportster 1970–1983, forged stainless steel with a proprietary German impregnation process that hardens the surface to .002″ depth. Superior wear resistance, lower friction, and corrosion protection compared to chrome or nickel plating.

Features

• German Black Diamond impregnation process to .002″ depth
• One-piece stainless steel forging
• Excellent flow characteristics
• Reduced friction and superior corrosion resistance

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-4196
• Length: 4.3 in
• Width: 3.45 in
• Height: 1.9 in
• Weight: 0.21 lbs

Fitment

Fits Harley-Davidson Sportster models 1970 through 1983 as an intake valve replacement.

Frequently Asked Questions

What makes Black Diamond valves different from standard valves?

The proprietary German impregnation process hardens the surface to .002″ depth, improving wear resistance and reducing friction better than chrome or nickel plating.

Will this fit my 1985+ Sportster?

This part is for 1970–1983 Sportster models only. Newer Sportsters use different valve sizes and configurations.

Is this an intake or exhaust valve?

This is an intake valve. KPMI makes separate exhaust valves with the same Black Diamond process.

Do I need both intake and exhaust valves?

That depends on your engine's condition. If only the intake is worn, you can replace just this valve. Many riders refresh both at the same time.