im planning on buying the cobalt addiction stage 3 soon. would i be able to run the 2.7 pulley with a bigger heat exchanger safely? i dont want to have meth injection. i also plan on getting the ETD, rims, im gonna be taking the boy racer wing off. what is the widest tires i can have with 19 inch rims? im not gonna lower my car. im gonna get some custom exhaust, magnaflow. also an intake. what other mods do you think i should i do? thanks for any advice and info.