I was just doing a t-up on my 03 rx1( MCX ,15lbs,Wiesco low comps,14000 brutal Kms on set up)and i have to adjust the intake clearance again because of zero valve lash. The intake valves on these motors seem to be really soft, even non turbo motors require constant valve adjustrments if you really like to hang on to the paddle for extended periods of time. Does anyone know of an aftermarket stainless valve that is available. Thx