The Supertech forged piston set for Ford/Mazda 2.3L engines with an 87.5mm bore includes four pistons with a -6cc dome profile producing an 11:1 compression ratio. Sold as a set of four excluding rings, these pistons provide a specific combustion chamber volume for engine builds requiring that compression level while matching the stated bore.
Supertech Ford/Mazda 2.3L 87.5mm Bore -6cc Dome 11:1 CR Pistons - Set of 4 (Excl Rings)