Yes they are the same. Cams on a N/T are alittle taller on the intake.Red1991TSI said:It is my understanding that they are. I believe the cam profiles are different. We are speaking 4g63 to 4g63, not 420a.
Some NA heads have smaller holes on #1#2 center 2 holes that do not fit over 6 bolt arp head studs without modification .Engine: 4g63 1990 6 bolt
Are the turbo and non turbo 4g63 heads the same? I.E Size of combustion chamber etc. I tried to search, but found no relevant information. Thanks in advance. Btw, sorry for the newb question lol.