In 2007 Hunter-Reay began to drive the #91 Riley MkXI-Pontiac 5.0L V8 for Riley-Matthews Motorsports in the DP class. At the season-opening Rolex 24 at Daytona Hunter-Reay co-drove with Jim Matthews, Marc Goossens and Jimmie Johnson. The car was sponsored at the race by Lowe's (who was the sponsor of Johnson's #48 Hendrick Motorsports Chevrolet Monte Carlo SS in the NASCAR Nextel Cup Series). The car started in 3rd place both overall and in class. The car completed 560 laps due to an engine failure. The car finished in 36th place overall and in 19th place in class. Hunter-Reay drove the car in three other races, all without sponsorship. At the Sahlen's Six Hours of the Glen at Watkins Glen International Hunter-Reay co-drove with Matthews and Goossens. The car started in 15th place both overall and in its class. The car completed 167 laps to finish in 6th place both overall and in its class. At the Emco Gears Classic at Mid-Ohio Sports Car Course Hunter-Reay drove with the same drivers to start in 17th place (the race only had DP class cars). The car completed 125 laps to finish in 11th place. Hunter-Reay returned to the series at the season-ending Discount Tire Sunchaser 1000 at Miller Motorsports Park Hunter-Reay drove with the same drivers to start in 19th place both overall and in its class. The car led for 20 laps and completed 139 laps to win the race both overall and in its class. Hunter-Reay finished 36th in the DP drivers standings with 92 points. The #91 Riley-Matthews Motorsports entry would finish 9th in the DP teams championship with 298 points.