First before they kill you for not looking at the top of the section you just posted in let me tell you to look there for most of your questions. Second I wouldnt realy worry about the HP and the tranny that much because the most you will be doing with n20 is a 75 to 100 shot and that isnt even the same as what a stage2 turbo puts down. Our tranny has been proven to handle a descent amount of power it just heats up thus you really need to cool it. The biggest things though to save your tranny will be a cooler and the shift kit.