The Supertech beehive valve spring kit for Ford/Mazda Duratec 2.0L/2.3L engines is supplied for those heads and calls for using the OEM retainer and OEM seat. Designed as a beehive-style spring set, it replaces factory springs during rebuilds or service while retaining original retainers and seats per the installation note for proper fitment.
Supertech Ford/Mazda DURATEC 2.0L/2.3L Beehive Valve Spring Kit (Use OEM Retainer/OEM Seat)