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

KB Pistons forged 4032 alloy pistons for Twin Cam 88 to 95ci engines with 10.5:1 compression and .020 oversized bore. Engineered with 11% silicon content and formed via precision forging for superior crack resistance under detonation and pre-ignition, making them ideal for street or race use with power adders like NOS or supercharger boost.

Features

• 4032 forged alloy with 11% silicon content
• Superior crack resistance under detonation and pre-ignition
• Coated skirts reduce friction and piston noise
• Includes wrist pins, wrist pin locks, and complete ring set
• Suitable for forced induction (NOS, supercharger, turbo)

Specifications

• Brand: KB Pistons
• Manufacturer Part #: KB906C.020
• UPC: 800745152824
• Compression Ratio: 10.5:1
• Bore Oversized: .020 inch
• Engine Application: Twin Cam 88 to 95ci
• Weight: 2.6 lbs
• Country of Origin: Mexico

Fitment

Fits Twin Cam engines from 88ci to 95ci displacement with .020 inch overbore. Designed for street and race applications with power adders including nitrous, supercharger, or turbo boost.

Frequently Asked Questions

What's included with these pistons?

Wrist pins, wrist pin locks (2 per piston), and a complete ring set. Pistons are sold as a pair.

Can I use these without power adders?

Yes. While engineered to handle boost and NOS, KB forged pistons work reliably in naturally aspirated street applications.

Are these coated?

Yes. All Twin Cam and Sportster applications feature coated skirts to reduce friction and noise.

What if a ring wears out?

Replacement rings are available as special order through KB Pistons.

Do I need new wrist pin locks?

The locks are included with the pistons. You need 2 locks per piston (4 total for the pair).