If so, what brand? I'm thinking about going with Ferea's for my B18C1. I was also thinking about going with bronze valve guides, anyone using them? Thanks for any input.

 

Oversized valves aren't needed on the Honda heads. They are big enough as is. That is why no one really has them. Just get a good port and polish on the head. http://www.portflow.com

The Brass valve guides sound like a very good idea to me. They decrease friction between the guide and valve. I would also look into new valves just not oversized. Material is going to matter more than size (on hondas )

 

what about for LS motors?
the vtec has 33mm intakes and 28mm exhaust.
the LS has 31mm intake and 28mm exhaust.
i was considering going oversize on my LS intake valves.

 

I have 33mm ferrea stainless intakes on my LS/B20 head. The chambers on these heads are very similar to the B16A. The biggest limitation is the smaller diameter of the intake valves. Overboost.com has an article on building an LS head with Tom at Portflow. You used to be able to read the whole article but now you have to pay. http://www.overboost.com/story.asp?id=463

 

For the LS the simple solution would be to swap a B16 head.

I know it is a pain but if you want performance then why keep the LS head?

 

Would be nice to have bigger valves on a turbo honda motor. I think on a proper turbo motor exhuast valves should be bigger then intake valves.