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Assuming your corner exit is on point
Change only one setting at a time in small increments
From more to less influence
Further improvements to speed is to cover up the cooling elements of the car more, like the water and oil coolers, or the brake vent ducts, which will not affect the cars handling performance, but will increase the temperature of the water, oil, and/or brakes! Take note of the temperatures, and make sure you are not exceeding 100C for water, 120C for oil, or ~900C for brakes after heavy braking. Also note that air temperatures will affect your cars temperature as well!
If the car allows for changing of fuel mixtures, this can help with both acceleration and straightline speed overall with the downside of consuming more fuel in the process. Note that increasing the electronic motor map on a hypercar does NOT increase the cars overall power output!
To further help with straightline speed, you can reduce the front and rear toes and bring the values closer to 0 to reduce the rear toe-in and front toe-out, but doing so, will impact the cars turning performance and high speed stability.
If you can afford, try to bring the car overall closer to the ground, but not too far as bottoming out will have a negative impact on your straightline speed.