The stock coolinghead on the Gen is fine and i never have overheating problems.Sometimes after-market coolingheads can make engines run to cold and that can be a problem for winter running and tuning.The stock coolinghead on engines are there for a reason and the factory racers cant be wrong as they use the stock coolinghead for racing!

Dont't get me wrong,aftermarket heads do look good and add some bling to your ride but is it really necessarly?