AllMotorLover17

what could i do to my 08 2.0l NA impreza to add horsepower? i tried fitting a HKS legamax but it didnt produce any sound so i decided to take it off. Then the shop told me that i should also install the HKS legamax midpipe(3"pipe)? But my friends advised me not to go through with it.. cause it would just lose power, what should i do to make the sound come out and add some horsepower?