(Stafford Springs, CT)—The NAPA SK 5K has become a staple on the Stafford Speedway calendar marking the longest race of the season for the SK Modified® division. For the 10th edition of the event, Stafford Speedway officials have announced a base purse of $28,700 before any bonuses including $5,000 to the winner and $500 for last place. With the increase, the 11th place finisher will earn $1,000, making the August 4th event the richest SK Modified® race of the season.