Kb Pistons Hypereutectic Cast Piston - Pistons Shovel 80ci 7.2:1 STD — Harley-Davidson Electra Glide, Super Glide, Wide Glide (1980-1984)

KB Pistons Hypereutectic cast piston for Shovelhead 80ci engines at standard bore, designed with 16% silicon content for high thermal stability and low expansion. Ideal for air-cooled engines running stock to mild compression ratios up to 10.5:1 on pump fuel.

Features

• Hypereutectic alloy with 16% silicon content
• Low thermal expansion rate
• Tight piston-to-cylinder wall clearances
• Reduced engine wear and noise
• Suitable for stock to 10.5:1 compression

Specifications

• Brand: KB Pistons
• Manufacturer Part #: KB288.STD
• UPC: 800745063618
• Engine: Shovelhead 80ci
• Compression Ratio: 7.2:1 Standard
• Length: 9.5 in
• Width: 4.8 in
• Height: 4.6 in
• Weight: 2.5 lbs
• Country of Origin: Mexico

Fitment

Fits air-cooled Shovelhead engines with 80 cubic inch displacement at standard bore.

Frequently Asked Questions

What compression ratio is this piston rated for?

7.2:1 standard compression. Hypereutectic pistons are suitable for stock to mild ratios up to 10.5:1 on pump fuel.

Why is the silicon content important?

16% silicon content provides high thermal stability and low expansion, allowing tighter piston-to-cylinder clearances for better ring seal and quieter running.

Will this fit my 80ci Shovel engine?

Yes — this is a standard bore replacement for 80 cubic inch Shovelhead engines.

Can I run this piston with higher octane fuel or forced induction?

These hypereutectic pistons are engineered for stock to mild compression ratios on pump fuel. Higher-compression builds or boost require forged pistons rated for those conditions.