Select type, year, make, and model
The KB Performance Piston Kit, model KB297.020, is engineered for high-performance Harley Big Twin engines. Crafted from high-strength T-5 heat-treated 390 hypereutectic aluminum alloy, these pistons provide a tighter fit for enhanced durability and a longer lifespan of pistons and rings. The diamond-machined surface ensures precision weight matching within one gram and maintains manufacturing tolerances under half a thousandth of an inch, ensuring optimal balance and performance in your engine. Each kit includes two pistons, pins, spiral-lock clips, and Hastings moly rings, offering a comprehensive upgrade for your engine rebuild or performance enhancement.
KB pistons are designed to install tighter than standard options, resulting in reduced piston rock and superior ring seal. Proper piston clearance is critical; therefore, detailed instructions are included to guide correct installation and ring end gap adjustments. Due to the pistons' thermal conductivity and specific design features, special attention must be given during assembly to ensure optimal performance and longevity. The piston kit's construction and precision manufacturing make it suitable for demanding applications, providing reliable power and efficiency in Harley Davidson Big Twin engines with a 4.250-inch stroke and a compression ratio of 8.3:1.
For ongoing maintenance, replacement piston rings and pin lock rings are available separately, allowing for cost-effective repairs and upgrades. With a focus on quality and performance, the KB Performance Piston Kit is an ideal choice for enthusiasts seeking to maximize engine output and durability. Proper installation and adherence to provided instructions will ensure the benefits of this high-performance component are fully realized, making it a valuable addition to your Harley engine build or rebuild project.
Features:
US Dollars
