Hi Guys,GTT stage 4 head uses Shrick exhaust valves as are a fair bit bigger than Ultrik ones. This also allows the throat diameter to be taken out (CNC milled) further aswell
tbh guys you only want to do the head once .....We sell much more stage 4 heads than any other stage for that reason.
Our GTT350T car runs our stage 4 head and Shrick cam....thats our choice . I think with Shrick 'you just know' its going to be the right. and on things that are difficult to 'test yourselve' such as grinding tolerances, production tolerances,material, hardness etc then when its your own car and the consequences of a fault huge ...that helps.
Best Regards Roland GTT
