KPMI Valve Guide - IN / EX +0.001 Bronze HD Evolution 1987-1999 — Harley-Davidson (1984-2004)

KPMI valve guide in bronze for Harley Evolution engines 1987–1999, sized at +0.001 in oversized for intake and exhaust ports. Direct OEM replacement for worn guides that affect valve sealing and engine performance.

Features

• Bronze construction
• Oversized +0.001 in
• Fits both intake and exhaust ports
• Direct OEM replacement

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-4321
• Material: Bronze
• Length: 1.15 in
• Width: 3.45 in
• Height: 0.7 in
• Weight: 0.1 lbs

Fitment

Fits Harley-Davidson Evolution engines 1987 through 1999. This is an oversized +0.001 in guide for both intake and exhaust valve ports.

Frequently Asked Questions

What does +0.001 oversized mean?

The guide is 0.001 inches larger in diameter than stock, designed to fit worn valve seats after a slight machine operation on the cylinder head.

Will this fit my 2000+ Harley?

No — this guide is for Evolution engines only, 1987-1999. Newer Twin Cam and Milwaukee-Eight engines use different guide specifications.

Do I need both intake and exhaust guides?

This part fits both intake and exhaust valve ports. Order the quantity needed for your engine rebuild or valve seat service.

Is professional installation required?

Valve guide installation requires precise machining and press-fitting into the cylinder head. Professional machine shop installation is recommended.