KPMI Black Diamond Exhaust Valve - HD Shovelhead 1978-1983 — Harley-Davidson Electra Glide, Super Glide, Low Rider (1970-1984)

KPMI Black Diamond exhaust valve for Harley Shovelhead engines, featuring stainless steel construction hardened by a proprietary German impregnation process to .002

Features

• Stainless steel construction
• Black Diamond® impregnation process to .002" depth
• Surface hardening improves wear resistance
• Reduced friction compared to chrome plating
• One-piece forging
• Excellent flow characteristics

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-4195
• Length: 4.45 in
• Width: 4.15 in
• Height: 1.7 in
• Weight: 0.18 lbs

Fitment

Fits Harley-Davidson Shovelhead engines, 1978-1983 model years.

Frequently Asked Questions

What makes Black Diamond® valves different from chrome-plated valves?

The Black Diamond process impregnates stainless steel to .002" depth, reducing friction and providing superior corrosion and wear resistance versus chrome or nickel plating.

Is this a direct fit for my 1978-1983 Shovelhead?

Yes — this exhaust valve is engineered for Shovelhead cylinder heads in that model range.

Are these one-piece or multi-piece valves?

One-piece forgings that eliminate weak points and provide consistent flow characteristics.

Do I need to replace the intake valve too?

This is an exhaust valve. Check your engine to determine if both intake and exhaust valves need replacement.