The Supertech dual valve spring kit for Honda F20 and K20A2 engines supplies matched dual springs intended for those engine families. The description identifies this Supertech kit as applicable to F20/K20A2 engines. It is offered as a valve spring replacement option for head work or service on the listed Honda engines, providing the paired springs specified for those applications.
Supertech Honda F20/K20A2 Dual Valve Spring Kit