I got a discount code before from another member and it helped me save a little.
"To take advantage of your discount:
* Please visit
www.rockauto.com and put the parts you need in the Shopping Cart.
* Use the following discount code:
651980589220
* Enter your discount code (and no other characters or spaces) in the "How did you hear about us" line of the shopping cart.
* If you are using our traditional HTML catalog, please click the "Set" button to the right of the field.
* Your discount will automatically appear, subtracted from your order total."