CP Piston & Ring Set for Nissan RB26DET - Bore (86.5mm) - Size (+0.5mm) - Compression Ratio (8.5)

This is a set of forged pistons and rings from CP Pistons, specifically made for the Nissan RB26DET engine. These are a +0.5mm oversize set, meaning the bore diameter is 86.5mm, designed to replace worn or damaged pistons in your RB26DET. With a compression ratio of 8.5:1, these pistons are intended for builds where a lower compression is desired, often for forced induction applications where boost will be added.

CP Pistons are well-known in the performance engine building world. They are forged from high-strength aluminum alloys, which makes them significantly stronger and more durable than cast pistons. This strength is crucial for handling the increased cylinder pressures and temperatures that come with performance modifications, especially turbocharging. The 8.5:1 compression ratio is a notable feature, indicating these are designed for engines that will run higher boost levels. This allows for more boost pressure to be safely applied before detonation becomes a concern. The set includes the necessary rings to complete the piston assembly.

When rebuilding an RB26DET, especially for performance, using quality pistons like these from CP Pistons is a solid choice. It's important to note 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.