Supertech Nissan RB26 2.6L 87mm Bore +15.5cc Dome 8.5:1 CR Pistons - Set of 6 (Excl Rings)

Supertech is well-known for making solid internal engine components, and these forged pistons for the Nissan RB26 2.6L engine are a prime example. If you're building or rebuilding a high-performance RB26, these pistons are designed to handle the demands of a serious engine build. They feature an 87mm bore and a +15.5cc dome volume, which helps achieve a compression ratio of 8.5:1. This specific compression ratio is often chosen for boosted applications where controlled combustion is key to reliability and power output.

These pistons are forged from high-strength aluminum, a process that creates a denser, more durable structure compared to cast pistons. This makes them resistant to the extreme pressures and temperatures found in a performance engine. The 8.5:1 compression ratio is a popular choice for tuners looking to run significant boost levels while maintaining reasonable street manners and avoiding detonation. The dome shape is carefully calculated to work with the RB26 cylinder head's combustion chamber to achieve this target ratio. Remember that these pistons are sold as a set of six and do not include piston rings, which will need to be purchased separately to complete the installation.

When installing these pistons, it's crucial to follow the manufacturer's recommended clearances and lubrication procedures. Proper ring gap setting and cylinder wall preparation are essential for optimal performance and longevity. Because these are a performance component, it's always a good idea to consult with your engine builder or a trusted performance shop to ensure they are the right fit for your specific build goals and supporting modifications.