CP Piston & Ring Set for Nissan RB30/RB25DET-Bore (87.0mm)-Size (+1.0mm)-Compression Ratio (8.5)

CP Pistons is well-known for making strong, reliable internal engine components for performance applications. This piston and ring set is built for Nissan RB30 and RB25DET engines, specifically designed for builds that need a bit more displacement or are looking to refresh their engine internals with robust parts. The set is designed to work with an 87.0mm bore, and this particular set is sized at +1.0mm, meaning it's intended for engines that have been bored out to this specific dimension. This is a common step when rebuilding an engine to ensure a fresh, perfectly round cylinder wall for optimal sealing and performance.

This set features a compression ratio of 8.5:1, which is a solid choice for many performance-oriented builds, especially those that plan to use forced induction like a turbocharger or supercharger. A lower compression ratio like this helps prevent detonation under boost, allowing you to safely make more power. The pistons themselves are forged, which means they start as a solid block of aluminum that is heated and hammered into shape under extreme pressure. This process creates a much stronger and more durable piston than cast aluminum, making them resistant to the higher stresses and temperatures found in performance engines. The set includes the necessary rings to complete the piston assembly.

When rebuilding your RB engine, choosing well-built internal components is crucial for longevity and performance. This CP Pistons set offers a strong foundation for your build. Please note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.