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Supertech set of 16 single valve springs for Honda ZC and D16A1/D16A9 DOHC engines is supplied as a direct replacement spring kit for those cylinder heads. Intended for routine valve train service or rebuilds where the specified single‑spring configuration is required, the set covers all cylinders for a complete head refresh.
Supertech Honda ZC/D16A1/D16A9 DOHC Single Valve Spring - Set of 16
