Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
I'd stick with standard. They're only an issue if you like the rev limiter too much and with the turbo conversion you're making peak torque way down the revs. I did find one brand of non genuine valves that are 1 piece rather than friction welded heads onto the shaft, but it was by chance and i can't remember what they were.