KPMI Valve Seat - Exhaust 1.378" X 1.024 X 0.434" — Harley-Davidson (2017-2024)

KPMI Kibblewhite exhaust valve seat in 1.378" x 1.024" x 0.434" for high-performance and vintage engines. Built from proprietary material that resists microwelding and seat recession while maintaining thermal stability across leaded, unleaded, methanol, and ethanol fuel blends.

Features

• Kibblewhite proprietary seat material
• Resists microwelding and valve seat recession
• Excellent thermal characteristics
• Compatible with leaded, unleaded, methanol, and ethanol fuels
• Generous radius leading edge for easier installation

Specifications

• Brand: KPMI
• Manufacturer Part #: 10-HC350
• Bore Size: 1.378 in x 1.024 in x 0.434 in
• Length: 2 in
• Width: 2 in
• Height: 1 in
• Weight: 0.25 lbs

Frequently Asked Questions

What fuels is this valve seat compatible with?

Works with leaded, unleaded, methanol, and ethanol fuel blends without degradation.

Does this prevent valve seat recession?

The proprietary material resists microwelding that causes recession and seat damage over time.

Is the leading edge designed for easy installation?

Yes — the generous radius on the leading edge helps guide the seat into the bore during installation.

What engines does this fit?

Verify the bore size (1.378" x 1.024" x 0.434") against your engine's exhaust valve specification before ordering.