Campos has completed its GP3 line-up after recruiting Raoul Hyman and Marcos Siebert to partner Julien Falchero.
Hyman and Siebert both carried out pre-season testing for the Spanish outfit and the pair will make their respective debuts in the championship this weekend at the Circuit de Barcelona-Catalunya.
Hyman steps up after a truncated F3 campaign in 2016, while Siebert claimed last year’s Italian Formula 4 championship.
The pair’s confirmation means 19 drivers across six teams are poised to compete in the opening round of the campaign alongside Formula 1 and Formula 2 this weekend.
The grid has been reduced in numbers compared to last year following Koiranen’s exit.
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