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This Ferrea dual valve spring set for Subaru STI engines is supplied as a set of 16 to replace all springs during head service. Designed for dual-spring valvetrains, the set lets technicians renew the entire spring complement to restore uniform valve control. Choose the set when performing a full rebuild or when upgrading components to ensure matched spring behavior across the head.
Ferrea Subaru STI Dual Valve Spring - Set of 16
