Kibble white valves

[hart]

Hi every one, i was just wondering about going with bigger valves and what is the procedure, i know i will have to get it machined out for the bigger valves but could someone give me a price range that this setup would cost , and how it worked out for you?? thanks . this is for a 400ex:)

[chad502ex]

kibble white valves are good. for a 400ex only go bigger on the intake side. Unless your running NOS, the exhaust side will not provide much gain in this head.

chad502ex

[hart]

ok thanks for the info, do u notice much of a gain in power? , i have a 416 with 11.1 comp stage 2 hot cam p&p , fmf titanium 4 and a uni filter / open air box, should i notic anything from the new intake valves?like all of us here know ,there will never bee too much horsepower!!:D