KPMI Cylinder Stud Kits - Studs EVO 1984-1999 — Harley-Davidson Electra Glide Classic, Softail Custom, Softail Heritage Classic (1984-1999)

KPMI cylinder stud kits for EVO-era V-twin engines, engineered from premium grade 8740 steel heat-treated to 180,000 psi yield strength. Threads are rolled after heat treating to retain maximum compressive stress and fatigue resistance, with a black oxide finish for corrosion protection and appearance.

Features

• Grade 8740 steel, 180,000 psi yield strength
• Threads rolled after heat treating for maximum fatigue life
• Centerless ground for precise concentricity
• Black oxide finish resists corrosion
• Interference-fit case threads maintain contact at high temperature

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-2098
• Material: Grade 8740 steel
• Yield Strength: 180,000 psi
• Length: 4.9 in
• Width: 7.75 in
• Height: 1.3 in
• Weight: 1.54 lbs

Fitment

Fits EVO-based V-twin engines from 1984 through 1999 Harley-Davidson and compatible V-twin platforms.

Frequently Asked Questions

What makes these studs stronger than factory studs?

Grade 8740 material heat-treated to 180,000 psi yield, with threads rolled after hardening to maximize fatigue life and stress retention.

Do these require special installation tools?

Standard cylinder stud tools work. Torque specs should follow your engine rebuild manual or KPMI documentation.

Will these fit my 2000+ Harley with Twin Cam or M8 engine?

No — these studs are designed for 1984-1999 EVO engines. Twin Cam and M8 engines use different stud designs and lengths.

What's the black coating?

Black oxide finish provides corrosion resistance and a professional appearance without adding thickness that would affect fitment.