Wiseco AC/HON B 4v DOME +8.25 STRUT 81.25mm Piston Kit

Forged from 2618 aluminum right here in the USA, these Wiseco pistons are built for serious performance. The 81.25mm bore size and the +8.25cc dome shape are specific design choices that matter for tuning your engine's compression ratio and combustion chamber volume. This set is intended for 4-valve Honda B16A engines, where precision and durability are key for heavy or severe duty builds.

Wiseco machines these pistons with a focus on sealing and longevity. You'll find precision ring grooves, an anti-detonation groove, and other features aimed at improving ring seal. The crown is fully machined for a clean combustion surface, and the piston pin bores are designed for forced pin oiling to ensure the wrist pin stays well-lubricated under high stress. Plus, they come with an ArmorGlide skirt coating. This isn't just for looks; it helps reduce friction, makes operation quieter, and resists seizure, which is critical when you're pushing your engine hard.

This kit includes four pistons, ready for installation. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.