Supertech Mazda Miata 1.6L 78.50mm (+0.50) -10.5cc Dish 8.8:1 CR Piston - Set of 4 (Excl Rings)

Supertech is known for making well-built engine components, and this set of four forged pistons for the Mazda Miata 1.6L is a prime example. If you're rebuilding or modifying your Miata's engine, these pistons are designed to handle increased stress and provide a solid foundation for your build. They come in a 78.50mm bore size, which is 0.50mm over the stock size, accounting for engine wear or for a slight increase in displacement. The dish volume is -10.5cc, which helps achieve a compression ratio of 8.8:1, a good balance for many performance applications without being excessively high for pump gas.

These pistons are forged, meaning they start as a solid block of aluminum that's heated and hammered into shape. This process creates a much stronger and more durable piston than cast ones, making them ideal for engines that see harder use or higher boost levels. The 8.8:1 compression ratio is a notable figure, offering improved torque and responsiveness over stock, while still being manageable for street use. It's important to note that this set does not include piston rings, so you'll need to source those separately to complete the installation.

When installing these pistons, remember they are a specific size – 78.50mm – and are intended for engines that can accommodate this overbore. Always consult your engine's service manual or a trusted mechanic for proper installation procedures, including ring gap settings and bearing clearances, to ensure optimal performance and longevity. This set is a solid option for Miata owners looking to refresh their engine with durable, performance-oriented components.