CP Piston & Ring Set for Honda R18 - Bore (81.0mm) - Size (STD) - Compression Ratio (9.0) - Set of 4

This is a set of four forged pistons and rings from CP Pistons, specifically made for the Honda R18 engine. If you're rebuilding the engine in your Civic or CR-V and looking for a strong, reliable replacement for your stock pistons, these are a solid option. They come in the standard bore size of 81.0mm, meaning they're designed to fit right into an engine block that hasn't been bored out yet. The 9.0:1 compression ratio is also right in line with the factory spec, making them a direct replacement that won't drastically alter your engine's performance characteristics unless you're tuning it for more power.

CP Pistons are well-known in the performance and racing world for their robust construction. These pistons are forged, which means they start as a solid block of aluminum that's heated and hammered into shape under immense pressure. This process creates a much stronger and more durable piston than cast aluminum, making them more resistant to the stresses of higher performance applications or just the general wear and tear of daily driving. The included rings are also designed to work seamlessly with these pistons, ensuring a good seal between the piston and cylinder wall for optimal compression and oil control.

When you're undertaking an engine rebuild, especially one involving replacing pistons, it's important to have all the right components. This set includes the four pistons and their corresponding ring sets. Remember 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 during your engine build.