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

KB Pistons Hypereutectic cast pistons for Twin Cam 88 (TC88) engines bored to 95 cubic inches, featuring 16% silicon content for low thermal expansion and tight piston-to-cylinder clearances. Built for stock or mild compression ratios up to 10.5:1 on pump fuel, these deliver improved ring seal, quieter operation, and reduced wear in air-cooled applications.

Features

• 16% silicon hypereutectic alloy
• Low thermal expansion rate
• Tight piston-to-cylinder clearances
• Optimized for 10.5:1 compression ratio
• Standard bore size

Specifications

• Brand: KB Pistons
• Manufacturer Part #: KB411.STD
• UPC: 800745152244
• Engine: Twin Cam 88 (TC88) / 95 cubic inches
• Compression Ratio: 10.5:1
• Length: 9.5 in
• Width: 4.8 in
• Height: 4.6 in
• Weight: 3.1 lbs
• Country of Origin: Mexico

Fitment

Fits Harley-Davidson Twin Cam 88 (TC88) engines bored to 95 cubic inches with stock or mild compression builds.

Frequently Asked Questions

What fuel should I run with these pistons?

These hypereutectic pistons are designed for pump fuel on engines up to 10.5:1 compression. Higher ratios or boost may require premium or race fuel.

Why hypereutectic alloy instead of forged?

Hypereutectic alloy offers lower thermal expansion and tighter piston-to-cylinder clearances ideal for air-cooled engines, resulting in better ring seal and quieter operation than forged pistons at comparable compression ratios.

Will these work in my 95ci Twin Cam engine?

Yes — these are sized for Twin Cam 88 engines bored to 95 cubic inches at standard bore. Verify your engine displacement and bore size before ordering.

Do I need to replace my rings and wrist pins?

Ring and wrist pin replacement is recommended as part of a complete piston installation. Consult your engine builder or service manual for proper specifications.