Max Verstappen edged out Red Bull team-mate Daniel Ricciardo to set the pace in the second practice session ahead of the Belgian GP as rivals Mercedes chose not to register a representative lap time.
Verstappen's impressive 1:48.085 on the supersoft tyres saw him finish over two tenths clear of Ricciardo, although the Dutchman did encounter power unit issues towards the end of the session.
Nico Hulkenberg and Sergio Perez were third and fifth fastest respectively, with Ferrari's Sebastian Vettel sandwiched between the Force India pair on an encouraging Friday for the Silverstone outfit.
Nico Rosberg was only sixth quickest, albeit on the slower soft compound tyres, while Kimi Raikkonen wound up seventh after struggling to notch a competitive time on the supersoft rubber.
Romain Grosjean was a promising eighth for Haas, with Jenson Button, leaping up the running order after a disappointing FP1, and Esteban Gutierrez completing the top ten.
There was a reversal of fortunes at Manor as Pascal Wehrlein finished a second clear of Esteban Ocon and took an eye-catching 11th place, as the team reap the rewards of their Mercedes engine on this relative 'power circuit'.
Fernando Alonso, who failed to set a time in FP1 and was forced to change all of his power unit components, was 12th ahead of Lewis Hamilton, who will join him at the foot of the field with his engine penalty, as the Briton focused entirely on long runs ahead of his anticipated charge through the field on Sunday.
Daniil Kvyat was 14th, with Marcus Ericsson 15th and Williams duo Valtteri Bottas and Felipe Massa down in 16th and 17th after neither were able to put in a competitive time on their low-fuel efforts.
Carlos Sainz was a couple of tenths adrift of team-mate Kvyat in P18 as Toro Rosso, running the 2015 Ferrari engine, suffer from their comparative lack of power.
It was a troubled afternoon for Renault as Kevin Magnussen took 19th and Jolyon Palmer, who ground to a halt early on before rebooting his car, 20th, only quicker than new boy Ocon and Sauber's Felipe Nasr.