Quote:
Originally Posted by jrw21 
So, how does a guy come across these hayabusa valve springs/seats..etc?
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The springs Metric. The volvo valves Metric. If your not going big on boost no need for the Volvo valves, I'm the only one running them due to wanting to run 30psi someday
Be very careful on the port/polish on the head. They can loose flow if the wrong area is touched. Only remove from the inside radius and areas that restrict flow. If you remove any material from a area that is stagnet you will ruin the head. Also porting work does not net much HP on a boosted motor since your cramming air in under boost.
Best, John Smith