HP gains

does anyone have an idea of the gains i might receive from replaceing stock intake with a K&N cai, and replacing stock exhaust with a dual pipe borla cat back system? i amd riving a 180tt roadster. and eveyrthing else is stock

Won't really see anything much from a new intake since its a turbo car, maybe a few ponies, as far as a catback you can expect 10-15 hp depending on pipe size and all.