Kb Pistons Hypereutectic Cast Piston - Pistons Tc88 TO 95ci 10.5:1 .020 — Harley-Davidson Road King, Road King Classic, Electra Glide (1999-2007)

KB Pistons Hypereutectic cast pistons for Twin-Cam 88 and 95ci engines, engineered with 16% silicon content for high thermal barrier properties and low expansion. Designed for stock to mild compression ratios up to 10.5:1 on pump fuel, these tight-tolerance pistons reduce wear and engine noise in air-cooled applications.

Features

• Hypereutectic alloy with 16% silicon content
• Low thermal expansion for tight piston-to-cylinder clearances
• Optimal ring seal and reduced engine noise
• Suitable for stock or mild compression up to 10.5:1
• Pump fuel compatible

Specifications

• Brand: KB Pistons
• Manufacturer Part #: KB411.020
• UPC: 800745152305
• Engine: Twin-Cam 88 and 95ci
• Compression Ratio: 10.5:1
• Piston Size: .020 over
• Weight: 2.5 lbs
• Country of Origin: Mexico

Fitment

Fits air-cooled Twin-Cam 88 and 95 cubic-inch engines running stock or mild performance compression ratios up to 10.5:1.

Frequently Asked Questions

What compression ratio are these pistons rated for?

These hypereutectic pistons are rated for stock to mild compression ratios up to 10.5:1 on pump fuel.

Why hypereutectic instead of forged pistons?

Hypereutectic alloy offers superior thermal properties and low expansion, ideal for air-cooled engines. Forged pistons are better for high-compression or racing applications.

Do these require a machine shop to install?

Yes — piston installation requires disassembly of the engine and should be performed by a qualified machine shop or experienced builder.

What is the .020 measurement?

The .020 refers to the oversize — these pistons are .020 inches larger in diameter than stock, requiring the cylinder to be bored to match.