hey guys whats going on .. i am new to this forum so bare with me

i am wanting to change my NPI intake to a PI intake .. i have heard and i can get some good gains out of it...has anybody done this... if so can you tell me how and what you did .. thanks
i am wanting to change my NPI intake to a PI intake .. i have heard and i can get some good gains out of it...has anybody done this... if so can you tell me how and what you did .. thanks