i thought few guys at ah wah setup till 1.8 bar safely. but not really sure internal stock or not..
no, they just remove more material on the lower area (valve close)...then adjust tappet to compensate...High profile to low can do but low to high, add steel and re-machine it?
but if we compare the price with aftermarket camshaft is more expensive bro.. thats why i'm wonder is it okay to do or not..I see. I'll stick to original used high cams. Hehhee.