Anyone have experience on this product?

 

yes, they are a good product and a good company in general

 

pefect valve spring setup...portflow inner and itr yellow outer.....and a good set of titanium retainers

 

yeah, try and get yellow outer spring for both sides. they are also lower priced than the blue ones from honda...

yellows are a lil stiffer

in my gsr head, im running itr cams, itr lmas, portflow inners, portflow ti retainers, yellow (i forgot, i think they are intake side) outer, blue outer exhaust side. would also get ferrea keepers, but wasnt in the budget

you wont need to rev to 10k, as in there isnt much power up there, but if you miss shift, or want to stay on the gas going through a sweeper where you need to keep throttle down, and keep away from lift off

 

Thanks guys,
I will take them.
I'm rebuilding my b18c6 head, and with all component stock i think: 'A more stiff inner spring valve set is better, more pace when i'm on the red line.....