Drag Racing

It seems that there’s always discount coupons for race tickets for Thursday and Friday qualifying days. Of course, my kids want to go this year. I am afraid they won’t enjoy the noise as much as I did as a kid. I want to limit the amount of money I potentially will be wasting on the day. I haven’t heard any ads for the coupons. Anyone know if they exist?
OK folks… I know where to buy tickets- that wasn’t the question. When I go to buy tickets I’d like to have a coupon for a discount, where can I get coupons for discounted tickets?

Ticket Master