u misunderstand me. im going to buy ek4 next week. car have 4-1 dc sport headers, 60 mm straight tube, remus exhaust, aem,k&n air filter,exedy stage 2 clutch. i think it's 165-170 hp now. stock ek4 160 hp.but i wanna increase 200-210 hp. how can i increase ? which parts should i buy ? thanks.