The Supertech single valve spring kit for Nissan TB48 24V engines supplies single replacement springs matched to TB48 24-valve heads, as listed in the description. The product identifies TB48 24V coverage for this Supertech kit. Use this single-spring kit for valve spring replacement or head service on TB48 24V Nissan engines to obtain the spring set specified for that application.
Supertech Nissan TB48 24V Single Valve Spring Kit