There might be a shop somewhere in the country that offers a performance built head, I'm not aware of one. Companies do make high performance valves and valvesprings and such, so building up a head wouldn't be hard. I would have your head milled by a machinist and then just build it up. That way it will be more affordable and much more customizable.240newbie said:Anyone know where I could buy a new head for a KA24DE? I'm not sure I'm going to but I'll at least look into it. Can you buy high performance heads for this engine or do you have to buy high performance valves and springs and put them in?