The "Intimidator hemi" head uses a different style of shaft mounted rocker and 25/27mm steel valves with steel automotive style locks and retainers. The ports are actually really clean in stock form making them a perfect candidate for non ported performance or they can be ported as well. The valves run high in the casting so the piston to valve clearance is much further in the safe zone making the need for valve relief's almost not necessary at all (in most cases).

Chamber 20cc stock (milling available)

Valves 25/27mm (steel) 5mm stem

Valve locks and retainers are steel automotive style

Carb and exhaust bolt patterns are standard

Stock spring install height approximately .900"

Pushrod length in most cases 5.750" (dukar 212 stock pushrods will work many times in low spring pressure applications)

Ports and runners are very good in stock form but porting will make them even better

Please see a dyno example of a 236 with this head that has been ported, milled .030, 93 octane gas, 308 cam, piston .010 below deck, .045 head gasket, our narrow body 40 pound springs set at .870 tall and a nibbi 24 mm round slide carb

Please see picture showing possible adjusting screw trim area for some applications

For finished heads please allow 2 to 3 weeks to ship depending on workload at the time