All Speedmaster alloy cylinder heads are made using a superior "gravity die" cast process. These heads are flow tested on a Superflow SF600 at 28 inches with a 1/2 inch radius intake plate and short stack exhaust tube.
All Speedmaster alloy cylinder heads are made using a superior "gravity die" cast process. These heads are flow tested on a Superflow SF600 at 28 inches with a 1/2 inch radius intake plate and short stack exhaust tube.