CP Piston & Ring Set for Nissan RB25DET - Bore (87mm) - Size (+1.0mm) - CR (9.0) - Set of 6

If you're rebuilding the engine in your Nissan RB25DET for serious performance, a strong set of pistons is where you start. This set from CP Pistons is built for the demands of a high-output engine, giving you a solid foundation for your build. They're designed to handle increased cylinder pressures and temperatures that come with performance tuning, helping you get the most out of your engine.

These pistons are forged from high-strength aluminum, a process that makes them incredibly durable and resistant to deformation under extreme conditions. This particular set is 87mm in bore size, which is a +1.0mm oversize from the factory specification. This is often done when an engine needs to be bored out due to wear or to increase displacement slightly. The compression ratio is set at 9.0:1, a common target for turbocharged engines that balances pump gas drivability with the potential for significant power gains when boosted. This set includes pistons and rings for all six cylinders, ensuring you have everything you need for a complete engine rebuild.

When installing these pistons, remember they are an oversize part, so your engine block will need to be machined to the correct 87mm bore size by a qualified machine shop. This ensures a proper fit and seal. Because these are performance-oriented components, it's important to use them with a well-matched engine build, including appropriate camshafts, cylinder head work, and a robust fuel and ignition system to take full advantage of their capabilities.