CP Piston & Ring Set for Nissan RB25DET - Bore (86.5mm) - Size (+0.5mm) - Compression Ratio (8.5)

Forged from 2618 aluminum alloy, these CP Pistons are built to handle the demands of a performance Nissan RB25DET engine. The 86.5mm bore size, which is 0.5mm over the stock dimension, is ideal for rebuilding or upgrading an engine where the cylinders may need honing or a slight overbore. This specific set is designed to achieve an 8.5:1 compression ratio, a common target for turbocharged applications where boost will be added, offering a good balance between streetability and power potential.

CP Pistons are well-known for their robust construction and attention to detail. Each piston in this set is forged, a process that creates a stronger, more durable component compared to cast pistons. This strength is crucial for handling the increased cylinder pressures and temperatures found in modified or performance-oriented engines. The included rings are also selected to work seamlessly with the pistons, ensuring proper sealing for optimal performance and engine longevity. This set is a solid option for anyone looking to rebuild their RB25DET with reliable, high-performance internal components.

When installing these pistons, it's important to follow the manufacturer's recommended clearances and lubrication procedures. Because these are an over-size piston, proper cylinder wall preparation and measurement are critical for a good seal and to prevent premature wear. Always refer to the detailed installation instructions provided by CP Pistons for the best results.