Owen Jenner took his first win of the year with a last lap move to pass both Asher Durham and Aaron Silvester.
Aboard his Jenner Racing Yamaha, the number 86 had been sitting third on the final lap when he passed both in the last corner, beating Durham by 0.147s as championship leader Silvester had to settle for third.
Sam Laffins, who had ran up in the top three earlier in the race, took fourth with Edmund Best fifth.
Pirelli National Junior Superstock with Santander Consumer Finance, Race Two result:
1. Owen Jenner (Jenner Racing)
2. Asher Durham (G&S Racing) +0.147s
3. Aaron Silvester (A&J Racing) +0.368s
4. Sam Laffins (Uggly & Co by Binch Pro) +2.020s
5. Edmund Best (Symcirrus Motorsport) +5.073s
Championship points after Round Five:
1. Aaron Silvester 108
2. Asher Durham 70
3. Cameron Dawson 68
4. Owen Jenner 65
5. Louis Valleley 64