I have a jdm itr with stage 3 jun cams, cam gears, itr pistons the rest of the bottom end is stock with stock ecu which is all type R, fuel pressure regulater and pulleys and of the head has titanium retainers and springs.

I need help tuning this car I think I can run a 13 so pleassssssssssse send your words of wisdom

Oh yeah can I use ctr pistons to raise the compression without haveing clearance issues.With stock itr valves.