Thanks Simon appreciated, you responded very quickly whilst I moved my query to my original thread, thanks again. There is a blue race impreza which is NA using solid lifters from a BMW?? I guess to raise the rev limit. have you heard of this conversion at all. The other option I was considering was the light pressure turbo option 5 psi or there abouts. What needs to be done to the standard internals for this route? What can the standard internals cope with?
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