Rb25 Inlet Manifold On An Rb20

[RBLUV]

as per title i want a forward facing plenum on my 20 and i really want a greddy one however they did not make them for RB20

what are the differences in the 20 and 25 inlet manifold if any?

and could it be modified to fit?

[robots]

It could. But needs modifications to coolant galleries. As rb25 and rb20 are different in that matter. Also the inlet ports are different.

It has been done before though. So you can try it. Not a cheap bolt on job like for rb25 though.

[bubba]

So much headache that I'm making a custom setup as it's easier.

[vitz_n1]

buy a plazmaman manifold. they make em for rb20's. great manifold too.

[-_-StRyDeR-_-]

the plazmaman mani's are a bit big for the rb20 :S unless your chasing big power.

[RBLUV]

i like the look of the greddy ones i reckon they look sick, dont want some big chrome bling thing there

[TazzS13]

Mate the front facing ones on a 20 are really a lot of mucking around. I did one on mine and If i had my time again I definitely wouldnt. If your changing it because you have a top mount turbo just redirect the piping off the standard manifold as ugly as it is.

I know this isnt a greddy one but you get a basic idea

You will need a radiator header tank

vacuum fittings

modify the coolant pipes and also get it lined up so the top radiator hose still fits

throttle cable

throttle cable holder

battery in boot unless your buying a mega small one which is expensive

make sure the coolant lines dont foul on the thermostat housing

redirect a few vac lines and coolant hoses

I also had to change the angle on the flange that bolts to the TB to get it to line up with the battery tray and clear the TPS

after all that this is what it will look like.....and on a 20 with the large throttle body and shorter runners you may lose some response...which you dont really need with an RB20

Hope that helps you out a bit

Edited April 10, 2008 by TazzS13