Autozone is offering either 20% or a $25 gift card with $100 ship-to-home orders thru 12/18. Gift cards excluded. May take 4 weeks for gift card. I just posted a similar offer for O'Reilly's but it's for $100 in GC thru 12/24.

Details:All instant limits are per person per day and all rebate limits are per name, household or address. All items may not be available in all stores. Ad prices already include savings. We reserve the right to limit quantities. Ad prices not good combined with any other offer. No dealers. See store for warranty details. In stock items only. Offers may vary by market. See store for details. Offers valid while quantities last. All photographic, clerical, typographical and printing errors are subject to correction.*Promotional gift cards will be mailed within 4 weeks of order submission. Online Only Coupon: Offer Does Not Apply to purchase of overweight items such as engines and transmissions, oversized items such as large car top carriers or to Performance Carburetor's such as Edelbrock, Holley or Proform or to any Magnaflow, Airaid, Air Lift, MSD and Husky items or items not available for ship to home delivery. Offers valid on regular priced merchandise only and does not include any other discounts or special offers. Online deals issued by AutoZone are only valid for Ship to Home orders placed on AutoZone.com by the expiration date. Certain product categories or types are not eligible for discount. Gift card purchases, taxes and core charges excluded. Coupon may not be distributed via Internet sites. Not valid with any other offer or discount. Limit one coupon per customer. No adjustments to prior purchases. Items returned will only receive credit for the discounted price paid for the item. AutoZone reserves the right to cancel, modify or deactivate a coupon at its discretion. Coupon usage terms and conditions are subject to change at any time without prior written notice from AutoZone. Any fraudulent or unauthorized use or validations will void this offer. Coupon has no cash value and may not be redeemed for cash. Void where prohibited by law.