CP Piston & Ring Set for Mini Cooper S N14 1.6L - Bore (77.5mm)-Size (+0.5mm)-CR (10.5)-Set of 4

If you're rebuilding the top end of your Mini Cooper S with the N14 1.6L engine, especially if you're looking to get more performance out of it, a strong set of pistons is crucial. These forged pistons from CP Pistons are built to handle the demands of a performance engine. They are a 0.5mm oversize set, meaning they are designed to replace stock pistons that have been bored out to 77.5mm, which is common when addressing wear or when increasing displacement for more power.

Forged pistons are made from a solid block of aluminum alloy that's heated and hammered into shape under extreme pressure. This process creates a much denser, stronger, and more durable piston compared to cast pistons, which are made by pouring molten aluminum into a mold. This strength is essential for engines that see higher cylinder pressures, whether from forced induction or higher compression ratios. These pistons feature a 10.5:1 compression ratio, which is a slight bump over stock, offering a noticeable improvement in power and throttle response without being so high that it requires exotic fuel in most applications. The set includes four pistons and their corresponding rings, ready for installation.

When installing these pistons, it's important to ensure your engine block has been properly machined to the correct bore size and finish. Always refer to the manufacturer's installation instructions for specific clearances and assembly details. This set is a solid choice for anyone looking to build a reliable and powerful engine for their Mini Cooper S.