Recon Mission made every yard of the running to land the £100,000 Pavers Foundation Catherine Memorial Sprint Handicap at York for Tony Carroll and Robert Winston.
Trained by Michael O'Callaghan in Ireland as a juvenile, he had gone well at Chester before running in the Dash on Derby day at Epsom last time out.
Once Winston bounced him into an early lead the Kodiac colt always looked comfortable, showing he is fully capable at five and six furlongs.
Having nicked two lengths with more than a furlong to run, it was a matter of if his stamina would hold out, as the favourite Victory Day charged out of the pack under Jamie Spencer.
Recon Mission (20-1) was not for passing, though, and held on by a head with Magical Wish third and Cosmic Law fourth.
"He likes it out in front if he can, he's a nice horse, very talented," said Carroll, who was recording his biggest success in Britain since winning the Dash with Caspian Prince in 2014.
"He's got a lot of speed, as he showed in the Dash, so we were confident he could get to the front, he was unlucky in that against older horses.
"We could look at a Listed race, but ground is important - he needs cut. We could go to France or Ireland.
"We're having a great time at the minute and we've one or two nice horses. He's actually in the Wokingham, but it would be a bit tough on him to go again so soon against older horses - this was his race, in his own age.