I agree with beverlyhillsninja . The hx35 can be a great turbo. there are two ways to get it on a 4g63. using the bolt on BEP housing. thats the easy way but its laggy for 500whp turbo. Or you can use the 12cm twinscroll housing some come with. make or buy custom manifold that retains twin scroll. this route is time consuming and far more expensive, but the turbo is awesome setup that way. power hits 600rpm sooner in twin scroll form. that is a huge seat of the pants difference.