Supertech Honda K Series 86.50mm Bore +6.5cc Dome 11.2:1 CR Pistons - Set of 4 (Excl Rings)

Supertech is well-known for making solid engine components, and these forged pistons for Honda K-series engines are a prime example. If you're rebuilding the heart of your K-series, these pistons are designed to handle increased performance demands. They feature a specific bore size of 86.50mm and a dome volume of +6.5cc, which helps achieve a compression ratio of 11.2:1. This updated compression ratio can lead to improved power output when paired with appropriate tuning and supporting modifications.

These pistons are forged from high-strength aluminum alloy, a common choice for performance applications because it offers a good balance of strength and weight. The forged construction means they are more resistant to deformation and failure under high cylinder pressures compared to cast pistons. This set includes four pistons, but remember that rings are sold separately, so you'll need to source those to complete the installation. The 86.50mm bore size is a common upgrade for K-series engines, often used when rebuilding or increasing displacement.

When installing these pistons, it's crucial to follow the manufacturer's recommended clearances and procedures to ensure optimal performance and longevity. Because these are performance-oriented components, they are not CARB approved and cannot be shipped to California. Always consult the full installation manual from Supertech for detailed instructions and specifications before beginning your engine build.