FREE SMALL SUB WITH WITH PURHCASE OF MEDIUM OR LARGE SUB, CHIPS AND DRINK.Firehouse Subs Escondido 880 W Valley Pkwy, Escondido CA, 92025 2019 Firehouse Subs. This offer valid with coupon at participating restaurants. Prices and participation may vary, see restaurant for details. Limit one per customer, per visit. Not valid with any other offers. Exp. 3-31-20. SUB$SUBCOMBO