CP Piston BMW N20B20 - Bore (84.5mm) - Size (+2mm) - CR (10:1) - Set of 4

If you're rebuilding the engine in your BMW N20B20, a solid set of pistons is crucial for performance and reliability. This set from CP Pistons is built for those looking to go beyond stock specifications, whether you're aiming for more power or just want the best components for a fresh build. These aren't just replacement parts; they're designed to handle increased stress and deliver consistent performance.

CP Pistons are well-known in the performance engine world, and this set for the N20B20 is no exception. They're forged from high-strength aluminum, which gives them a strong yet lightweight construction. This specific set features an 84.5mm bore, which is a +2mm oversize from the factory specification. This allows for a larger displacement and can help clean up cylinder walls that might have wear or minor damage. The compression ratio is set at 10:1, a popular choice that balances power output with the ability to run on pump gas in many applications, though tuning is always recommended for optimal results. The set includes four pistons, ready for installation.

When undertaking an engine rebuild of this caliber, it's important to ensure all supporting components are up to the task. Proper balancing, ring gap setting, and cylinder wall preparation are key to a successful build. Always refer to the manufacturer's detailed installation instructions and consult with a professional engine builder if you have any questions about the process or required clearances.