To get a Summit "pro shop" discount, you need to send them a copy of your NHRA license. I got in 4 or 5 years ago, and they have have never asked for proof of license renewals since. It gets you about 5 - 10 % off on most items. Usually closer to 5. Once on a large order, they let me combine the 10% off coupon with the pro shop discount. Otherwise it has been one or the other. Once you are in the pro shop, the website automatically gives you the discount, and it won't allow a coupon. So if the coupon is better than the pro shop on anything, you need to phone them to use it.