Cameron Dawson ended second free practice on top after holding off Harrison Crosby with a best lap of 1min 34.185secs.
With the track now dry, laps were up to 10 seconds quicker in the second session, as Dawson put 0.167secs between himself and Crosby, with Cameron Hall third.
Kieran Kent, who led this morning’s practice, ended the day fourth quickest and just ahead of title challenger Asher Durham in fifth.
Pirelli National Junior Superstock with Santander Consumer Finance, Combined practice:
1. Cameron Dawson (MSS Performance) 1min 34.185s
2. Harrison Crosby (JR Performance Racing) +0.167s
3. Cameron Hall (Triple M powered by Nationwide Electrical) +0.475s
4. Kieran Kent (Lovell Kent Racing Team – LKR) +0.485s
5. Asher Durham (G&S Racing) +0.638s