Kb Pistons Forged Alloy Piston - Pistons 883 TO 1200 10.5:1 STD — Harley-Davidson Sportster 883, Sportster 883 Hugger, Super Low (1986-2019)

KB Pistons forged alloy piston set for Harley 883cc to 1200cc conversion, featuring 4032 forged alloy with 11% silicon content for superior crack resistance under detonation. Designed for street and race use, especially when running power adders like NOS or supercharger boost.

Features

• 4032 forged alloy with 11% silicon content
• Forged and fully machined construction
• Superior crack resistance under detonation or 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 #: KB925C.STD
• UPC: 800745154347
• Compression Ratio: 10.5:1
• Length: 9.5 in
• Width: 4.8 in
• Height: 4.6 in
• Weight: 2.5 lbs
• Country of Origin: Mexico

Fitment

Fits Harley 883cc to 1200cc conversion builds. Suited for street and race applications with power adders such as NOS or supercharger boost.

Frequently Asked Questions

What's included with this piston set?

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

Can I use these pistons with NOS or a supercharger?

Yes — the forged 4032 alloy construction with high silicon content is designed specifically for detonation resistance under boost or nitrous applications.

Do I need to order anything else separately?

You may need additional wrist pin locks if replacing multiple pistons — order 2 locks per piston. Replacement rings are also available as a special order.

Are the skirts coated?

Yes — all Twin Cam and Sportster application pistons feature coated skirts to reduce friction and wear.

Will these pistons fit my stock 883 or 1200?

These are for 883-to-1200 conversion builds. For stock engine bore specs, verify your target displacement and piston size with KB before ordering.