Exotic, no turbo cars are built to perform... your non-turbo'd 4 cylinder is not. Exotic, no turbo cars are designed and engineered to utilize the intercooler, and again your non-turbo'd 4 cylinder is not. I will bet that you will not see anywhere near a 30% increase in power with an intercooler on a stock or even mildly tuned non turbo'd s13-s15... but hey, it's your money and it'll sure look cool
