Supertech Mazda Miata 1.8L 83.5mm Bore 10.5cc Dome 11:1 CR Pistons - Set of 4 (Excl Rings)

Forged from high-strength aluminum alloy, these Supertech pistons are built to handle the increased demands of a performance-oriented 1.8L Mazda Miata engine. The 83.5mm bore size is a common upgrade for those looking to increase displacement, and the 10.5cc dome volume, combined with the piston's shape, helps achieve a target compression ratio of 11:1. This compression level is well-suited for naturally aspirated builds aiming for improved throttle response and power, or for forced induction setups where careful tuning can optimize performance and reliability.

Supertech uses a robust forging process for these pistons, which creates a denser, stronger grain structure compared to cast pistons. This makes them significantly more resistant to detonation and mechanical stress, crucial for engines that see hard use or are modified for higher output. The precise machining ensures a consistent wall thickness and proper skirt design for smooth operation within the cylinder bore. It's important to note that these pistons are sold as a set of four and do not include piston rings; you'll need to source those separately to complete the installation.

When rebuilding or significantly modifying your Miata's 1.8L engine, selecting pistons that can withstand the heat and pressure is paramount. These Supertech pistons offer a well-built solution for enthusiasts looking to build a reliable and powerful engine. Remember to consult your engine builder or a trusted mechanic for specific installation guidelines, including proper ring gap, bearing clearance, and assembly procedures, as these are critical for the longevity of your build.