Hey guys !! can anyone tell me if the RB26 exhaust manifolds will fit on a RB 25 head? other than cams, whats the difference ? Im looking at using the twin turbo manifold for my RB30/25. Cheers Guys Adrian

the exhaust manifolds will not fit on due to the studs on cylinders 3 and 5 being on opposing angles

i asume this is not something you can change around ?

well you could cut the flanges off, reweld them on the right way and machine them flat again but they will be prone to cracking

sweet thanks man. 1 last question. from the outside can you tell the difference from the RB25 and RB20 head ?? i brought mine with a "RB25" head but i want to be sure .....

yeah a rb20 head has no vct solenoid which is located infront of the inlet manifold

mmm ill check it out tomorrow and let you know. Is it possible that the single T3 turbo on the standard T3 manifold is to small for the RB30 ? imn having problems with waste gatecontroll good excuse to update to big turbo Some original photos have not been recovered yet.

maybe the diaphragm on the actuator has a hole in it. try blowing compressed air (not too hard) into it and see if the rod moves

Quote: Originally Posted by duz360 maybe the diaphragm on the actuator has a hole in it. try blowing compressed air (not too hard) into it and see if the rod moves my rod moves if you press to hard.... Quote: Originally Posted by PSIWOG Hey guys !! can anyone tell me if the RB26 exhaust manifolds will fit on a RB 25 head? other than cams, whats the difference ? Im looking at using the twin turbo manifold for my RB30/25. Cheers Guys Adrian holes on the exhust side are oval on the 26 head and round on the 25 head also Some original photos have not been recovered yet.