Hi there. I think boost by gear would be a great addition to the game, i would even argue a necessary one. There are some cars that would benefit greatly from this feature. Ill give you one example such as the Ibishu Covet. As it is a front wheel drive vehicle that can recieve a lot of power, it struggles for traction in the lower gears and even some of the higher gears when the boost is turned up. This is exaggerated when taking a turn and you find yourself veering into a wall. My suggestion: A module you can add in the parts menu or an ECU variant such as Race ECU + Boost by Gear or maybe implementing the feature into the already existing race ECU for all vehicles. Once you have installed the appropriate part you can then go to the tuning menu and find the boost by gear section or it could be combind into the section with wastegate pressure. There, you could adjust a slider for each gear the car has which limits the amount of boost the wastegate will allow into the engine whilst in that gear effectivly making it so you can fine tune the boost pressure in each gear to eliminate wheel spin.