Aston Martin trails Mercedes by 51 points as the campaign resumes in Zandvoort after the summer break, with the Silverstone squad having experienced a dip in form since Canada.
For this weekend, the team has submitted to the FIA a heavily revised floor and diffuser.
A revised lower surface of the floor body, reshaped floor fences and tweaked floor edge have been conceived in tandem to improve airflow to increase the downforce generated.
These will work in conjunction with a new diffuser, for which the upper corner has been modified and a small winglet added, to improve the efficiency of the lower surface.
Fernando Alonso said of the upgrades: "[They are] to get a clear direction, not only for this year but also for next year in terms of direction on the car.
"In Canada, we brought some new parts as well, and Silverstone and now these new aerodynamic parts that we bring here, hopefully, add the performance we expect."
Mercedes has modified the floor edge of the W14, with a reduced span forward floor edge wing designed to "reduce losses improving flow to the rear and increasing rear downforce".
Source: Autosport