CLICK: Full race results and full Camping World Truck Series championship standings.

16-year-old Cole Custer won the UNOH 175 on Saturday afternoon to become the youngest-ever winner in the NASCAR Camping World Truck Series in what was only his seventh start in the championship for Haas Racing Development.

"I can't believe it's happening right now," said Custer in victory lane. "I've been coming since I was really young. Really young! I just can't believe it.

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"I've looked up to this series and everybody who races in this series, and I couldn't even imagine racing here and even winning a race. I can't even explain how amazing this is," he added.

Custer had proved to be the dominant force for much of the race in which he started from pole position for only the second time in his Truck career after edging Cameron Hayley by 0.056s, his lap of 28.877s (131.897mph) beating the previous series qualifying track record at New Hampshire Motor Speedway of 131.715mph set by Kyle Busch three years ago. Custer went on to lead for the first 67 laps before the first round of green flag pit stops allowed Erik Jones to temporarily take over for three laps.

Custer resumed at the front now with nearly five seconds in hand over Ryan Blaney as the race reached the midway point without any cautions, with Jones in third ahead of championship leader Matt Crafton who had started from the back after electrical problems sidelined him from the earlier qualifying session.

The first yellow came on lap 101 when TJ Bell hit the wall in turn 4 which enabled the leaders to pit under the ensuing caution, the #00 winning the race off pit road to resume in the lead ahead of Jones. By the time there were just 30 laps to go it seemed the race was on course to beat the record for the fewest cautions aver on the one-mile oval when suddenly there were four in quick succession.

The first was on lap 147 when JR Heffner spun and hit the wall in turn 4 while Brendan Newberry was passing him. The pit stops that followed saw Darrell Wallace Jr. and Jeb Burton make contact in a misunderstanding on pit road, but no great harm was done and Wallace took up second chair for the restart which was controlled by Jones and Matt Crafton after Custer dropped back to seventh by opting to take four tyres. The race was quickly back under caution for German Quiroga spinning out and the next restart was no more successful with Ryan Blaney this time getting caught out after contact with Timothy Peters.

That left ten laps remaining to the chequered flag, with Crafton still in control and Custer slugging it out to win a three-wide battle for second. He was just in the process of challenging for the lead when the final caution of the afternoon came out on lap 168 for Newberry spinning after tangling with Wallace in turn 2. When the green came out for the final restart on lap 171, Crafton suffered from wheel spin allowing Custer to once again get back in charge from where he was able to drive away to claim the victory from Wallace who beat Crafton and Johnny Sauter to finish in second place at the line.

"It was so hard to pass, even lappers," said Custer of his battle to get back to the front after dropping back in that late round of pit stops. "I couldn't believe we got through all of those guys. The air affected it so much. We had some great restarts, which helped us a lot."

"Started at the back, drove to the front, got beat at the end," Crafton summarised his day. "I spun the tyres and couldn't get it in fourth gear, to be totally honest. Once I spun the tyres, I was screwed right there. Then I couldn't get it in gear, and everybody had a run on me. My bad."

In the championship standings, Crafton manages to slightly extend his lead to seven points over Sauter while Ryan Blaney loses ground in third place, 11 points ahead of Wallace.

Full race results, plus qualifying and practice speeds and full Camping World Truck Series championship standings.