Wiseco Honda R18A 81.00mm 8.9:1 CR Bore -10cc Dome Piston Shelf Stock Kit

Forged from 2618 aluminum right here in the USA, these Wiseco pistons are built for serious performance in your Honda R18A engine. The 81.00mm bore and 8.9:1 compression ratio are designed to work with your engine's setup, and the -10cc dome helps achieve that specific compression target. Wiseco packs these with features like precision ring grooves, anti-detonation grooves, and improved ring seal to ensure everything works together reliably under demanding conditions.

You'll also find an ArmorGlide skirt coating on these pistons. This isn't just for looks; it helps reduce friction, resist seizure, and even makes for quieter operation. The fully machined crown and forced pin oiling are further details that show these are made for heavy-duty race applications where durability and consistent performance are critical. This kit includes everything you need for a set of four pistons.

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.