CP Piston & Ring Set for Mazda DISI MZR 2.3L - Bore (88.0mm) - Size (+0.5) - CR (9.5) - Set of 4

This is a set of four forged pistons and rings from CP Pistons, specifically made for Mazda DISI MZR 2.3L engines. These pistons are a +0.5mm overbore size, meaning they are 0.5mm larger in diameter than the stock pistons, intended for engines that have been bored out to match. They feature a 9.5:1 compression ratio, which is a common target for performance builds that still need to run on pump gas. CP Pistons are well-known in the performance engine building community for their strong construction and precise manufacturing.

Forged pistons like these are made from a solid block of aluminum that's heated and hammered into shape under extreme pressure. This process creates a much stronger and more durable piston than cast pistons, which are made by pouring molten aluminum into a mold. This makes them ideal for high-performance applications where engines experience higher cylinder pressures and temperatures. The 88.0mm bore size is specific to the +0.5mm overbore for the MZR 2.3L engine. This set includes the necessary rings to complete the piston assembly.

When rebuilding or modifying your Mazda MZR 2.3L engine, using a set of quality forged pistons is a solid choice for reliability and performance. It's important to ensure your engine block has been properly machined to the correct 88.0mm bore size before installing these pistons. Always refer to the manufacturer's installation instructions for proper ring gap setting and piston installation procedures.