Buy 2 Giant Subs, get a 3rd Giant Sub free, *of equal or lesser value. Offer valid at participating locations. Hurry! Offers expire 3/31/24. For single used only. Not to be combined with other offers. No cash value. Coupon redeemable in person. Offers with promo codes may also be redeemed in our app. 1007. Promo Code TSPA7.