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Description
Factory replacement type pistons. To avoid piston land breakage, HKS pistons are made with forged material instead of casting like the factory pistons. The shape of STEP2 is the same as STEP1. In-house test at 900PS confirmed the durability and safety. The setting range is widened by reducing the compression rate from 9.0 factory ratio to 8.7. This is effective to increase the engine output using the aluminum block specs and/or bigger cylinder bore. STEP2 piston's recess is 1mm deeper than a stock to best use with the STEP2 camshaft.
Pistons are the same ones as the ones used in 21004-AN017 STEP2 piston & rod kit.
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