Send in your Evo VIII, Evo IX, Evo X, and DSM cylinder heads for our port work. We port/polish your intake and exhaust ports as well as polish the combustion chambers. The head will then receive stainless valves, dual valve springs, new valve seals, 3 angle vavle job, and be cleaned and decked. This cylinder head is great for street cars as well as drag cars and has been proven in multiple 8 and 9 second cars.