Twin Turbo Manifolds 4 Rb25

[Raysboostin]

hi all,

a mate of mine is doin a build up on his r33 and we need to know if there is any off the shelf twin turbo manifolds to suit rb25. b4 u all start sayin "put a RB26 in it", or "just use a single turbo setup" he already has built the engine and has purchased turbos. if there isnt anything available he is just gonna have some made.

[PM-R33]

As far as im aware there isn't anything of the shelf available but it shouldnt cost too much to have one made up. There's a few RB25's running twin turbos on the forums, do a quick search for some threads and PM the owners of the cars and ask them.

Hope that helps.

[R31Nismoid]

I dont believe there is anything off-shelf.

Probably the easiest way is have an adapter plate cut so you can put RB26 gear on, will be a darn sight cheaper than custom fab'd everything.

[BAMR33]

buy rb26 manifolds and weld them onto an rb25 exhaust flange. Probably the easiest way to get around it.

[Raysboostin]

yeah i did a search, but couldn't find any info on off the shelf gear. thats y i asked. r the oem RB26 manifolds cast or fabricated??

edit: RB26 is cast. i guess u could buy one of those aftermarket stainless manifolds for a 26 and change the flanges to suit. it would look alot neater than a cut'n'shut oem manifold.

someone should do one of those sticky threads about twin turbo 25s. there seems to be alot of interest in it, and the questions r always the same.

Edited October 19, 2007 by Raysboostin

[BAMR33]

rb26 manifolds sell for like $80 a pair. To get a professional boilermaker to weld on the rb25 flange neatly would cost no more then $150. Plenty of benefits over custom fab i.e. cost, stock positioning, proven excellent flow, no chance of cracking.