Supertech Mazda Miata 1.8L 84mm Bore 2.5cc Dome 9.5:1 CR Pistons - Set of 4 (Excl Rings)

Forged from high-strength aluminum, these Supertech pistons are built to handle the demands of a performance-oriented Mazda Miata 1.8L engine. The 84mm bore size is a common upgrade for enthusiasts looking to increase displacement, and the 2.5cc dome volume is specifically calculated to achieve a 9.5:1 compression ratio when paired with the stock cylinder head. This compression ratio offers a good balance between power output and pump gas drivability for many modified setups.

Supertech uses a robust forging process for these pistons, which creates a stronger, more durable component than cast pistons. This makes them a solid choice for engines that will see higher cylinder pressures and temperatures, whether from forced induction or higher-revving naturally aspirated builds. The pistons are machined to precise tolerances for a proper fit within the cylinder bore, ensuring good sealing and efficient operation. Keep in mind that these pistons are sold as a set of four and do not include piston rings, so you'll need to source those separately to complete the installation.

When rebuilding or modifying your Miata's engine, choosing the right internal components is crucial. These Supertech pistons are a well-built option for those aiming to improve their engine's performance and reliability. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures, and ensure you have the correct tools and knowledge for engine work, especially when dealing with critical components like pistons.