Max Cook converted pole position into the opening win of the day after a dramatic 12-lap scrap this morning.
Despite dropping to second into the first corner, it took just a few moments before he was at the front, eventually beating Louis Valleley by almost six seconds.
Third was Sam Laffins, just ahead of Dan Brooks as Aaron Silvester took fifth.
Pirelli National Junior Superstock Championship with MotoNovo Finance, Oulton Park, Race One:
1. Max Cook (Uggly & Co by Binch Pro)
2. Louis Valleley (Team Val-Tech Racing/Mortimer Racing +5.946s
3. Sam Laffins (Cheshire Mouldings Kawasaki by JR Performance) +7.209s
4. Dan Brooks (R4R Vision Team) +8.015s
5. Aaron Silvester (A&J Racing) +9.508