Elite Motorsport's Ary Bansal set the fastest lap of the day in the final Friday session at Snetterton, completing a clean sweep of fastest times for Elite Motorsport on the final day of testing at the team's local circuit.
The Indian driver posted a 1m48.246s lap midway through the final 30 minutes, enough to put him over a quarter of a second clear of teammate Isaac Phelps, who had topped the first two sessions at the Norfolk venue.
Thomas Ingram Hill denied Elite a 1-2-3 at the top of the times, as the Brit popped his Fortec Motorsports car into third place on the combined times for the day, a couple of tenths ahead of Alex Kattoulas.
Alex O'Grady was the lead KMR Sport contender in fifth, just 0.033s behind the Japanese-Greek contender and 0.050s clear of Douglas Motorsport's Luke Hilton who completed the top-six.
Fortec's Jack Taylor and Hillspeed's championship leader Dan Guinchard were separated by 0.027s in seventh and eighth, with Guinchard's teammate Leandro Juncos and Douglas Motorsport's Enzo Hallman completing a top-10 covered by 0.870s.
All drivers inside the top-10 recorded their best times in the final session. Series newcomers Dudley Ruddock (Arden) and Flame Airikkala (Pace) ended preparations ahead of their debut weekend by clocking the 21st and 22nd quickest times respectively, and were separated by two tenths of a second.
Bansal's Friday best lap fell just 0.040s away from Phelps' best lap of the week, set in Thursday's third session.
The field returns to action with qualifying at 11.10 tomorrow morning (Saturday).
GB4 Championship, partnered by the BRDC, Snetterton Friday combined test result:
1. Ary Bansal, Elite Motorsport, 1m48.246s
2. Isaac Phelps, Elite Motorsport, +0.269s
3. Thomas Ingram Hill, Fortec Motorsports, +0.425s
4. Alex Kattoulas, Elite Motorsport, +0.634s
5. Alex O'Grady, KMR Sport, +0.667s
6. Luke Hilton, Douglas Motorsport, +0.717s
7. Jack Taylor, Fortec Motorsports, +0.739s
8. Dan Guinchard, Hillspeed, +0.766s
9. Leandro Juncos, Hillspeed, +0.802s
10. Enzo Hallman, Douglas Motorsport, +0.870s
11. Leon Wilson, Arden Motorsport, +1.258s
12. Dayton Coulthard, Douglas Motorsport, +1.406s
13. Megan Bruce, KMR Sport, +1.648s
14. Stefan Bostandjiev, Pace Performance, +1.690s
15. Callum Baxter, Graham Brunton Racing, +1.737s
16. Ava Dobson, Arden Motorsport, +1.802s
17. Alex Berg, Graham Brunton Racing, +1.930s
18. Jason Pribyl, ADM, +1.951s
19. Josh McLean, Pace Performance, +2.434s
20. Holly Miall, Fox Motorsport, +3.108s
21. Dudley Ruddock, Arden Motorsport, +3.306s
22. Flame Airikkala, Pace Performance, +3.518s
23. Lily May Watkins, KMR Sport, +4.046s
24. Caitlyn McDaniel, Fox Motorsport, +4.515s