R34 Exhaust Manifolds

[Haines]

Do the NEO heads take the same exhaust manifold as all rb25's

I know the intake is different but I'm not sure on the exhaust side

and how much power gain would you get from running a stainless steel one compared to a normal cast one

[SKY 34]

it should be the same...the difference is only at the head..

[Haines]

yeah but do all the studs line up

I have Neo and am getting a s/steel manifold off a rb25 non neo

in theory it should be the same right ??

[Abo Bob]

Are you in Sydney? My manifold is off atm so we could test fit an r33 one.

[Haines]

Nah mate im up in Townsville North qld

Its coming with a turbo so if i dont use it its no biggy Ill just put turbo on stock manifold

I dont even know what kinda increase there would be if any ,its just ill have it and thought why not

[shnaped_second]

From what i understand the manifolds should fit both as im after one aswell, but as for more power, im sure there would be some form of increase but noting dramatic

[Haines]

Yeah It just here to be used that is all

if it fits is it worth putting on or should i try and sell it and use that money towards injectors or sometihng

[satanic]

I'd say keep the stock manifold; it does the job just fine and will maintain your responsiveness.

Also; you won't have to worry about the S/S manifold being of shitty quality and breaking.

[SKY 34]

heys I've checked with a certain performance shop mechanics, he said if whatever manifold you getting is good quality, it'll fit exactly...

however chances are your manifold will be made in China, there'll be a bit off missmatch, you just have to bore a wider hole for some........

also as you purchase the manifold you have to make sure 3 things

1- all surfaces are flat, the flange where the manifold connects to the engine block and the connection to the turbo (sit the surface on the ground to check, machine them if they are slightly curved)

2-The manifold lengths have to be relatively simmilar, if you have two longer outer pipes and a much shorter inner pipes it will cause some heating and backpressure problem in the inner manifold

3- where the external wastegate pipe is welded on, make sure the position is where all the 6 pipes joined. Some manifolds have their external wastegate inlet welded onto one pipe only. Not a good idea as the pressure from the remaining 5 manifolds will not be released, causing overboosting problem

and performance wise, it is not recomended to change unless necessary such as changing into top mount turbo

cheers

[Haines]

thanks

yeah I would only put on there for wank factor (ooohhh shiny parts )

but im going stealth with my car so ill stick with stock looking stuff

it keeps the popo from harassing me

and ive only got a target power goal of 240 - 250rwkws so its not going to help me much having it on there

so ill sell it and get my 480cc injectors