CP Piston & Ring Set for Mazda DISI MZR 2.3L - Bore (88.0mm) - Size (+0.55mm) - CR (9.0) - Set of 4

If you're rebuilding the engine in your Mazda DISI MZR 2.3L, this set of four forged pistons and rings from CP Pistons is a solid choice for a high-performance build. These pistons are specifically sized at 88.0mm bore and are 0.55mm oversize, meaning they're intended for an engine block that has been bored out to accommodate them. The 9.0:1 compression ratio is a notable figure, suggesting these are designed for engines that have seen some modifications and require a specific compression level for optimal power output.

CP Pistons are well-known in the performance engine building world for their robust construction. These are forged pistons, 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 ideal for engines that will be pushed hard. The included rings are essential for proper sealing between the piston and cylinder wall, which is critical for compression, oil control, and overall engine health. This set is designed to fit right into a prepared Mazda DISI MZR 2.3L engine, assuming the block has been machined to the specified 88.0mm bore.

When undertaking an engine rebuild of this caliber, it's important to ensure all components are properly prepared and installed according to manufacturer specifications. This includes ensuring the cylinder walls are honed to the correct finish for the included rings and that proper lubrication is used throughout the assembly process. Because these are an oversize piston, the engine block must be professionally machined to the exact bore size specified by CP Pistons. Please note that this part is not CARB approved and cannot be shipped to California.