i wanna here what every one has to say about there cool heads what are the pros and cons

thx guys

 

I run the Pro-Design head on my quad, while my son has the Noss head on his. I've got Noss domes in mine (PD), and he has Pro-Design domes in his (Noss). I think they are both great heads. We haven't had any problems out of any of them. However, I do like the Noss domes a bit better than the Pro-Design domes.

The pros:
1. More cooling around the combustion chamber (infrared heat gun shows a significant reduction in head temperature - 40 to 50 degress - with both heads compared to a stock head).
2. Ability to change compression with a switch of domes.
3. Cheaper rebuilds if a ring or piston lets go, and a new dome has to be acquired.

The cons:
None, other than cost.

Regards,
Buttermilk385