Hrmm,..im not sure if it works on our engines,but i have heard about some B18C-R using B16B cams on the intake and B18C-R on the exhaust... If im not mistaken,the intake of the B16B is slightly higher then the ori B18C-R.. Im not sure if it applies on 4G9X as well..did consider trying to mix and match 93 cams on intake, and maintain 91 cams on the exhaust... But never actually got to do it..
Owhh,so the marking for 92 non mivec is D... Good to know that.. hehehe..
Ram,manage to fix your problem yet?