Louis Valleley ended day one at Brands Hatch on top after beating Sam Laffins to the best time with a lap of 1min 30.304secs.
Laffins ended the session 0.434secs adrift, as championship leader Aaron Silvester was third, Kier Armstrong fourth and Declan Connell fifth ahead of qualifying tomorrow.
Pirelli National Junior Superstock with Santander Consumer Finance, FP2 result:
1. Louis Valleley (LVR) 1min 30.304s
2. Sam Laffins (Uggly & Co by Binch Pro) +0.434s
3. Aaron Silvester (A&J Racing) +0.455s
4. Kier Armstrong (Lincolnshire Racing Mulisha) +0.817s
5. Decan Connell (DC Racing) +0.909s