Originally Posted by
VMax1000
The seal is a bugger to fit properly. It will leak when the tank is filled to the brim. Had the same on mine and after filling up there was always a smell of fuel in the car until the level went down to about 3/4 full.
Definitely worth checking, but would be amazed if it would lead to the problem you're describing.
Car does step sideways easy enough already in tight corners with a decent amount of throttle.
If it only happens in right hand corners maybe checking the alignment and camber is not a bad idea.
Also check the tyre pressures (34 psi front, 36 rear rear)