Kb Pistons Forged Alloy Piston - Pistons Tc96 TO 103ci 9.5:1 .020 — Harley-Davidson (2007-2017)

KB Pistons forged 4032 alloy pistons for Twin Cam 96 to 103ci engines at 9.5:1 compression ratio with .020 oversized bore. Built with 11% silicon content and formed in a forging press for superior crack resistance under detonation, ideal for street or race applications 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 on Twin Cam and Sportster applications
• Includes rings, wrist pins, and wrist pin locks
• Sold as a pair

Specifications

• Brand: KB Pistons
• Manufacturer Part #: KB907C.020
• UPC: 800745153180
• Bore Size: .020 oversized
• Compression Ratio: 9.5:1
• Engine Compatibility: Twin Cam 96 to 103ci
• Weight: 2.6 lbs
• Country of Origin: Mexico

Fitment

Fits Twin Cam engines from 96 cubic inches to 103 cubic inches with .020 bore oversizing.

Frequently Asked Questions

What's included with these pistons?

Piston pair, piston rings, wrist pins, and wrist pin locks are all included. Replacement rings are available as special order.

Are these good for turbocharged or supercharged applications?

Yes — KB forged pistons are designed to handle power adders like NOS, turbochargers, and superchargers without premature failure.

Do I need wrist pin locks, and how many?

Yes. You need 2 wrist pin locks per piston — 4 locks total for the pair, and they're included in this kit.

Will these work on a stock Harley or do I need to modify the engine?

At 9.5:1 compression, these are safe for street riding on stock fuel. However, if running boost or NOS, ensure your ignition and fuel system are properly tuned to prevent detonation.