KFC is offering Chicken Box and Zinger Stacker for only $4 on Thursday, 26 May 2022. This offer is only available after 11am. Valid for dine-in and takeaway online orders made through www.kfc.com.sg and the KFC Singapore App only. Not available for use over-the-counter, self-order kiosk and sale & catering orders. This promotion is not available at KFC Nanyang Technological University, Singapore Polytechnic and Singapore Zoo. Not valid with other promo codes, offers and discounts.