Kb Pistons Hypereutectic Cast Piston .020 - Harley Shovelhead 88-89ci
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.
Maximize the performance and durability of your Shovelhead 88-89ci engine with the Kb Pistons Hypereutectic Cast Piston. These pistons are engineered with advanced materials to deliver a tight ring seal and quieter operation in air-cooled V-twins.
Why riders pick this
- 16% silicon hypereutectic alloy construction
- Low thermal expansion for tight clearances
- Optimal ring seal and reduced wear
- Quiet engine operation
- Designed for stock to mild builds on pump fuel
These Kb Pistons Hypereutectic Cast Pistons are specifically designed for Shovelhead 88-89ci engines, featuring a .020 oversize. Built with a significant 16% silicon content, the hypereutectic alloy provides superior thermal barrier properties and a low expansion rate. This design characteristic allows for tight piston-to-cylinder wall clearance, which is critical for maintaining an optimal ring seal and promoting quieter, more wear-resistant operation in air-cooled engines. They are ideal for stock or mild compression ratios up to 10.5:1, running reliably on pump fuel.
Advanced Design for Shovelhead Longevity
- 16% silicon hypereutectic alloy for high thermal stability
- Low thermal expansion rate enables tight piston-to-cylinder clearance
- Optimized ring seal for consistent power
- Wear-resistant operation for extended engine life
- Suitable for stock to mild compression ratios on pump fuel
Building a Better Shovelhead Engine
When undertaking an engine rebuild or performance upgrade, the choice of pistons is paramount. These Kb Pistons require your Shovelhead 88-89ci cylinders to be bored and honed to the .020 oversize for a perfect fit. This precision ensures that you unlock the full benefits of the hypereutectic design, leading to a more efficient and durable engine. They are an excellent option for Harley Touring, Softail, or Dyna riders seeking dependable performance.
Specifications
- Brand: KB Pistons
- Manufacturer Part #: KB294.020
- UPC: 800745064110
- Engine Displacement: Shovel 88–89ci
- Piston Size: .020 oversized
- Length: 9.5 in
- Width: 4.8 in
- Height: 4.6 in
- Weight: 2.5 lbs
- Country of Origin: Mexico
Common questions
What compression ratio are these pistons rated for?
These hypereutectic pistons are rated for stock to mild compression ratios up to 10.5:1, designed for Shovelhead 88-89ci engines running on pump fuel.
What does '.020 oversized' mean for installation?
The '.020 oversized' means your cylinders will need to be bored and honed to this exact dimension to ensure proper piston-to-wall clearance and optimal performance.
Why choose hypereutectic pistons for an air-cooled engine?
Hypereutectic pistons, with their high silicon content, offer superior thermal stability and low expansion, which is crucial for maintaining tight clearances and reducing noise in air-cooled V-twin engines.
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 | 824-01165 |
| WEIGHT | 2.5 lb |
