Supertech Mazda Miata 1.8L 85mm Bore 10cc Dome 11:1 CR Pistons - Set of 4 (Excl Rings)

If you're rebuilding the engine in your Mazda Miata 1.8L and looking to increase compression for better performance, this set of Supertech pistons is a solid choice. These pistons are designed to raise the compression ratio to 11:1, which can help your engine make more power, especially when paired with other performance modifications. The 85mm bore size is standard for many 1.8L Miata engines, and the 10cc dome shape is specifically engineered to achieve that 11:1 compression target.

Supertech uses forged aluminum for these pistons, a stronger material than cast aluminum. This means they can handle the increased cylinder pressures that come with a higher compression ratio and more aggressive engine tuning. The pistons are machined to precise tolerances to ensure a good seal with the cylinder walls and proper fitment. Keep in mind that this set includes the pistons only; you'll need to purchase piston rings separately, as they are not included.

When installing these pistons, it's crucial to follow the manufacturer's recommended clearances and procedures. Because these are a performance part designed to increase compression, they are not CARB approved and cannot be shipped to California. Ensure your engine build plan accounts for the increased compression and potential need for ECU tuning to take full advantage of these components.