For all those trying to get those free to cheap spark plugs from Amazon here's a trick you can use.
1) Buy those spark plugs and get the Autolite rebate
2) Buy an AC Delco Cabin Air Filter
3) Click here
for the AC Delco rebate
Feel free to compare Amazon to Rockauto and see which one offers the better deal. You can also add the FRAM oil and air filter deal as well if it will help with the bottom line.