Spec Racing
SNAIL was the first GTPlanet league to prohibit tuning in all of our races. This combined with the fact that we race in the same cars produces a type of racing called "spec" racing. Spec racing ensures that success is determined solely by driving skill and not by differences in car power, gearing, suspension, weight, or aerodynamics. Because variables in the car are eliminated, spec racing is the truest measure of driver skill! It also produces intense battles for position because all of the cars are equally strong or weak in the same areas of the track. Another benefit of spec racing is that you'll never spend time tuning cars or wondering if someone is truly faster than you or if they just have a better tune.
That is taken right from the first post and has read this way for a long time. All cars are to be identical when it comes to performance. If you're doing anything to change your car's performance then you are in violation of the rules of SNAIL.
There is no way to penalize for an infraction that can not be detected so it is left up to the driver and their integrity to not change settings that SNAIL can't police.