Does rb26 manifold bolt on to rb25

[skribblah]

yae or nay

[wawazat8402]

Nay, I dont remember which runner for sure, but one of them has the bolt pattern clocked the exact opposite of the 25 bolt pattern.

[s14kouki]

nope, however i think someone makes an adapater plate, but you're better off just getting a greddy manifold

[jobestudios]

Are you interested in the plenum or the whole ITB setup as well?

[skribblah]

lets say both.

[jobestudios]

It's not impossible... but it doesnt bolt right up

[BoostFab]

i'm assuming you're referring to the exhaust manifold.the 3 & 4 runner flange are clocked differently. the rest should bolt up. if you don't mind tap a new threaded hole into the head to match, it should work this route.

[skribblah]

referring to intake manifold sweet heart

[RB20Skyline]

You need a adaptor plate between the head and individualthrottle body's for the GTR intake plenum conversion. You canmake another adaptor plate to eliminate the individual throttlebody's. They are good for around 1000hp on a drag GTR, so Idon't see the point in eliminating them.

A CNC shop should be able to make an adaptor plate if they havethe RB25 head, GTR intake plenum parts, etc or a dummy RB25motor + GTR intake plenum parts.

When you look at the mods that need to be done to a RB25 headlike Tomei solid cam conversion, higher lift stock GTR cams, etc, it'sbetter to buy a stock RB26 head, as it has higher lift GTR solid camsetup and I think slightly bigger valves, etc. Also correct bolt patternfor both twin turbo exhaust manifolds and stock GTR intake plenum+ individual throttle body's.
Modified by RB20Skyline at 6:53 AM 3/11/2007

[skribblah]

so RB26 head bolts on to rb25 block??

[BoostFab]

referring to intake manifold sweet heart

ew....that just sent a shiver down on my kneck...

so RB26 head bolts on to rb25 block??

no, the rb26 head bolts are bigger than the 25's. to use them you need to tap out the holes to match.

[duece.four.oh.sx]

ew....that just sent a shiver down on my kneck...

that just made me laugh .........