Kb Pistons Forged Alloy Piston - Pistons Tc88 TO 95ci 9.25:1 STD — Harley-Davidson Road King, Road King Classic, Electra Glide (1999-2007)

KB Pistons forged alloy pistons for Twin Cam 88 to 95ci engines at 9.25:1 compression, standard bore. Made from 4032 forged alloy with 11% silicon content for superior crack resistance under detonation or pre-ignition, suitable for street or race use with power adders like NOS or boost.

Features

• 4032 forged alloy with 11% silicon content
• Formed in forging press and fully machined
• Superior crack resistance under detonation or pre-ignition
• Coated skirts on all Twin Cam applications
• Includes rings, wrist pins, and wrist pin locks
• Sold as a pair

Specifications

• Brand: KB Pistons
• Manufacturer Part #: KB904C.STD
• UPC: 800745152367
• Engine: Twin Cam 88 to 95ci
• Compression Ratio: 9.25:1
• Bore: Standard
• Weight: 5.0333 lbs
• Country of Origin: Mexico

Fitment

Fits Twin Cam 88 to 95ci engines at standard bore. Engineered for street or race applications with power adders such as NOS or boost.

Frequently Asked Questions

What's included with the piston pair?

Rings, wrist pins, and wrist pin locks are included. You will need to order 2 locks per piston.

Can I use these pistons on a stock engine?

Yes, these work in stock applications, but they are engineered for engines with power adders like NOS or boost where crack resistance matters most.

Why are replacement rings a special order?

KB Pistons stocks these rings separately so you don't pay for extras you may not need. Contact us for availability and pricing.

What compression ratio do these give my engine?

These pistons deliver a 9.25:1 compression ratio at standard bore. Your actual compression depends on your cylinder heads and combustion chamber volume.

Are the skirts coated?

Yes — all Twin Cam applications feature coated skirts to reduce friction and wear.