KPMI Cylinder Stud Kits - Studs Twin CAM — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Road King (1999-2017)

KPMI cylinder stud kits for V-twin motorcycles, engineered from grade 8740 material heat-treated to 180,000 psi yield strength. Rolled threads after heat treating and center-less grinding ensure maximum fatigue life and concentricity for reliable clamping under high engine temperatures.

Features

• Grade 8740 material, 180,000 psi yield strength
• Threads rolled after heat treating for maximum compressive stress
• Slight interference fit at case end for high-temperature thread retention
• Center-less ground for concentricity
• Premium black oxide finish

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-20412
• Length: 4.85 in
• Width: 8.25 in
• Height: 1.35 in
• Weight: 1.53 lbs

Fitment

Fits V-twin motorcycles. Verify fitment with your bike's year and model before ordering.

Frequently Asked Questions

What makes these studs stronger than OEM?

Grade 8740 heat-treated material with rolled threads after heat treat maximizes fatigue strength and thread durability at high cylinder pressures.

Do these studs require special installation?

Installation should follow the bike manufacturer's torque specs. The slight interference fit at the case end helps maintain thread contact when hot.

Will these fit my Harley or Indian?

These are designed for V-twin engines. Confirm your specific model and year with the manufacturer or a dealer before ordering.

What finish do they have?

Premium black oxide coating for corrosion resistance and appearance.