Kb Pistons Forged Alloy Piston - Pistons Tc96 TO 103ci 10.5:1 STD — Harley-Davidson (2007-2017)

KB forged pistons for Twin Cam 96 to 103ci engines at 10.5:1 compression, machined from 4032 forged alloy with 11% silicon content. Superior crack resistance under detonation and pre-ignition, suitable for street or race use with power adders like NOS or boost.

Features

• 4032 forged alloy with 11% silicon content
• Forged and fully machined construction
• Superior crack resistance under detonation
• Coated skirts on Twin Cam applications
• All rings, wrist pins, and wrist pin locks included

Specifications

• Brand: KB Pistons
• Manufacturer Part #: KB909C.STD
• UPC: 800745152886
• Compression Ratio: 10.5:1
• Engine Displacement: 96 to 103ci Twin Cam
• Length: 6 in
• Width: 5 in
• Height: 5 in
• Weight: 2.55 lbs
• Country of Origin: Mexico

Fitment

Fits Twin Cam 96 to 103ci engines. Standard bore.

Frequently Asked Questions

What's included with these pistons?

Pistons sold as a pair with all rings, wrist pins, and wrist pin locks included. Replacement rings are special order.

Can I use these with power adders like NOS or a supercharger?

Yes — the 4032 forged alloy construction is engineered to handle detonation and pre-ignition from forced induction or nitrous.

Do I need to order wrist pin locks separately?

No — locks are included, but note you need two locks per piston (four total for a pair).

Will these fit my 103ci Twin Cam?

Yes — these fit any Twin Cam engine from 96ci to 103ci displacement at this 10.5:1 compression ratio.

Are the skirts coated?

Yes. All Twin Cam applications feature coated skirts for reduced friction and wear.