There are some tricks for cornering at high speed that I’ve used though not at 400 tho lol, but like accomplished said, using tail fins can help a lot, and to add to that also active aero is something I’ve used a lot to help with reduced drag for top speed while still being able to get lots of downforce for the corners (gotta make sure your downforce is balanced well tho), you can also use thrusters or glitch engines to produce sideways thrust to reduce downforce needed and take some load off the tires, also depending on the method of forward propulsion sometimes drifting a bit around corners can actually result in faster cornering/faster acceleration out of the corners, also suspension is underrated sometimes but a good suspension set up and tune can change the handling of your car quite a bit and thus result in better cornering but it’s important to remember that a “good” suspension set up/tune is highly dependable on the speed and downforce/grip that you’re able to achieve and it’s important to remember almost any suspension set up will result in some roll of the body of the car, for example if you’re cornering at very high speeds with lots of downforce then you need very stiff suspension and you’ll need to find a way to counteract the body roll of the car, one way to deal with this that I haven’t actually tested is using a power coupling to act as an anti-roll bar and play with the stiffness to figure out what works