The Supertech dual valve spring kit for Honda F20 and K20A2 engines supplies matched dual springs tailored to those engine families. The description explicitly lists F20/K20A2 as the intended application for this Supertech kit. It serves as a replacement option for valve spring service or cylinder head rebuilds on the cited Honda engines, providing the paired springs called out in the listing.
Supertech Honda F20/K20A2 Dual Valve Spring Kit