Haas have pushed forward the unveiling of their 2016 challenger will now take place on Sunday, hours after McLaren's launch.
The American outfit had initially scheduled their launch for Monday morning just prior to the green light at pre-season testing in Spain.
Haas, though, have now decided to lift the covers on Sunday.
Their launch will take place at 14:00 GMT, hours after McLaren's unveiling.
The Woking team will take the covers off their MP4-31 online at 10:00 GMT.