Kb Pistons Forged Alloy 9.5:1 Standard Bore Piston Kit - Harley EVO 80ci
About Kb Pistons
KB Performance Pistons builds hypereutectic and forged pistons for American V-twin engines, and is a long-standing choice for big-bore and stock-replacement rebuilds where budget and durability both matter.
Unlock the true potential of your Harley Evolution 80ci engine with Kb Pistons forged alloy pistons. These pistons feature a 9.5:1 compression ratio and a standard bore, providing a solid performance upgrade for your V-twin.
Why riders pick this
- 9.5:1 compression ratio for enhanced power
- Standard bore size for easy fitment
- Forged 4032 alloy for superior crack resistance
- Coated skirts reduce friction and wear
- Includes all rings, wrist pins, and locks
For riders looking to breathe new life into their Evolution 80ci engine, this Kb Pistons forged alloy piston kit is an ideal choice. With a 9.5:1 compression ratio, these pistons offer a noticeable bump in performance over stock, translating to more responsive power delivery. The standard bore size makes them a perfect fit for engines that don't require an overbore, streamlining your engine build or refresh.
Robust Construction for Demanding Rides
- Forged from 4032 alloy with 11% silicon content for extreme durability
- Designed to resist cracking and pre-ignition under high stress
- Coated skirts reduce friction, extending the life of the piston and cylinder walls
- Includes all necessary rings, wrist pins, and wrist pin locks for a complete install
Performance-Ready for EVO Engines
These pistons are not just for stock replacements; they're built to handle the demands of performance applications, including those running power adders like nitrous or superchargers. The superior crack resistance of the 4032 forged alloy ensures reliability when you push your EVO hard. For optimal performance, consider combining these pistons with a performance cam and a professional dyno tune.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB920C.STD
- UPC: 800745155290
- Compression Ratio: 9.5:1
- Engine Size: 80 cubic inches (EVO)
- Weight: 3.14 lbs
- Country of Origin: Mexico
Common questions
What is included with this piston kit?
This kit comes as a pair of pistons, complete with all necessary piston rings, wrist pins, and wrist pin locks.
Are these pistons suitable for engines with power adders?
Yes, the 4032 forged alloy construction with 11% silicon is specifically designed to resist cracking under detonation, making them ideal for applications with nitrous or superchargers.
Do these pistons require any special installation tools?
Standard engine building tools are typically sufficient. However, proper ring compressor and piston installation tools are recommended for a successful build.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Kb Pistons |
| TYPE | Piston kits & Components |
| SKU | 824-01606 |
| WEIGHT | 3.14 lb |
| 9.5 | 1 Compression |
