The Supertech piston set for Mazda Miata 1.8L engines supplies four forged pistons sized to an 84.0mm bore with a 2.5cc dome to give a 9.5:1 compression ratio; rings are excluded. Produced for the 84.0mm Miata cylinders, this set is intended for rebuilds and engine maintenance where that particular piston crown volume and compression are required to restore or set engine compression.
Supertech Mazda Miata 1.8L 84mm Bore 2.5cc Dome 9.5:1 CR Pistons - Set of 4 (Excl Rings)