If anyone knows off the top of their head, would be much appreciated. are the exhaust flanges on the rb30 and rb20 turbos the same...as in where the dump bolts on...

im gonna guess and say no. and i bet you im right

you mean where it bolts up to the manifold? They are a t3 and as such have a t3 flange like 30et and 25det turbos. The rear housing is different but not v-band like the 25 from memory? I'm sure Ryan will clear this one up.

both are T3 as mentioned above, but the rb20 has the wastegate as part of the rear housing, where the VL has the wastegate as part of the dump pipe. Both housings use a different dumppipe/flange pattern using a rb20 turbo on an rb30 will require a custom dump.

y would u even consider using a turbo that came off a rb20 on a rb30??

for fun, im about to put one on a VL, they have the same size rear just the rb 25 and rb 30 have a larger front housings. theVLguy is right on the money..

Not saying u ever said u where puting it on a rb30 So whats fun about putting a turbo on a car thats smaller then the one that was on it??

noi am putting one on the mrs car.. its free so ima use it, and she only daily drives it to worrk and wants the extra grunt for skids and flutters. so the small and early spool of the free 20 turbo will be shmicko

^^ translation she wants to DOSE IT ULEHHHH

lol i see hehe