Miki Monras posted the fastest time in F2 second free practice at Spa-Francorchamps, but it was 17-year-old debutant Jordan King who impressed the most setting the third quickest time.
Morning pacesetter Ramon Pineiro was quickest again for much of the session until King improved on the Spaniard's time by half a second around the half hour mark of the 45 minute session.
He was then knocked off top spot by Monras around five minutes later, half a second quicker than King. Monras remained on top through the final ten minutes of the session.
“Towards the end of the session I decided to put on a new set of tyres and we didn't make any mistakes so the lap time was there,” said Monras afterwards. “I think I can still improve a little bit but the important issue is that we are in the top and there is good confidence to go into qualifying tomorrow.
“This is my favourite track, it's incredible. In a Formula Two car it's even better because you are a lot faster in Eau Rouge and the other corners.”
Mihai Marinescu moved up into second place in the closing stages to demote King to third, with Pineiro fourth. Alex Brundle was fifth fastest.
Series leader Christopher Zanella, Mirko Bortolotti and Tobias Hegewald filled positions six to eight, the trio covered by just six hundredths of a second. Britons Jack Clarke and Will Bratt rounded out the top ten just six thousandths of a second apart.
1. Miki Monras, 2:09.124s
2. Mihai Marinescu, +0.498s
3. Jordan King, +0.520s
4. Ramon Pineiro, +0.999s
5. Alex Brundle, +1.155s
6. Christopher Zanella, +1.438s
7. Mirko Bortolotti, +1.442s
8. Tobias Hegewald, +1.497s
9. Jack Clarke, +1.720s
10. Will Bratt, +1.726s