GSTP Autoparts Promo Codes in November 2026

New shoppers can receive a discount on their first purchase by using a promo code displayed on the site, which is commonly referenced as the GSTP code. The offer is also promoted through a pop-up invitation to join the mailing list, where new subscribers are offered a percentage off their first order.

The site advertises free shipping on orders, with delivery handled through USPS, UPS, and FedEx and typical delivery windows of three to seven days once an order ships from the warehouse.

Subscribing to the GSTP newsletter gives customers access to updates on new arrivals, product announcements, and subscriber-only discount offers, including the first-order discount extended to new sign-ups.

The company runs an affiliate partner program rather than a traditional customer referral program. Affiliates can earn a commission on each sale they refer, and the program includes marketing materials such as banners and coupons, a monthly newsletter and data feed, dedicated partner management, and a cookie duration for tracking referred purchases. There is no cost to join, and sign-up is handled through third-party affiliate platforms linked from the program page.

GSTP states that it accepts returns of merchandise within 30 days of receipt, positioned on the site as a no-hassle return policy for customers who need to send an item back.

The site maintains a dedicated wholesale page, indicating that GSTP offers purchasing arrangements for business or bulk buyers in addition to standard retail sales, though specific wholesale terms are not detailed publicly on the main site.