Solving Exhaust Manifold Myths - RHD Vs. LHD

[felix_666]

Yes i have searched, but want to clarify some things.

For the uneducated, RHD cars have the problem of having a steering box in the space of where headers could go.

I would like to buy something better than stock manifold but not proper headers (even if gains are minimal because I'm at that compulsive point of replacing shit i don't need at all just for the sake of spending money on the car.... you know what i mean) and have started by comparing part numbers, this is what i have found about exhaust manifolds:

All except the Ti are based on a 02/73.

Regular 02's

Euro - RHD Manual - 11621265449

Euro - LHD Manual - 11621265449

U.S. - LHD Manual - 11621256211

Ti - 02/72

Euro - LHD Manual - 11621265449

Tii

Euro - RHD Manual - 11621251037 (anyone know why this is different??)

Euro - LHD Manual - 11621265449

U.S. - LHD Manual - 11621265449

From this it appears that they used the Tii manifold from LHD cars for the regular RHD 02's, and a different manifold for the RHD Tii's.

This explains why everyone says the regular RHD manifold flows well.

But my question to others is:

This must mean i can use the 02again replacement manifold which i hear nothing but good things about.

And maybe even the IE shorty headers (i will ask IE more info about these in terms of space)??

Your educated thoughts please.

Cheers.

[oz_tom]

I thought we (Oz) didnt get "tii manifolds"... Beaner/Shaun looked at all the part numbers on the cars down here and they all showed all the same part number on the manifolds. Go figure?!

[felix_666]

I'm confused as to what your saying Tom, all the numbers were the same on different manifolds, like normal and Tii??

[02Les]

Manifold 11 62 1 251 037 was used on all RHD 2002s (manual/auto/tii) but is now NLA and has been supeceeded by 11 62 1 265 449 which seems to be used on all LHD & RHD 2002s now. I do not know what was "special" about this manifold.

So, probably, you could use the 02again manifold, but would still need the RHD downpipe, or a custom downpipe/header like Jaymic makes (or used to make?) to avoid the RHD steering box/linkage.

[Beaner7102]

I'm confused as to what your saying Tom, all the numbers were the same on different manifolds, like normal and Tii??

Felix, Tom's car 'Whitey' is a Tii and has the same exhaust mani as my regular 02 (both cars are round lights) - that is looking at the numbers cast on the mani.

I did say 'they didnt fit the Tii mani on RHD cars' but that was a quote out of the Mike McCartney book. I never looked up the numbers - great news if that is true. beaner7102

[felix_666]

Ok i see what your saying.

The reason I'm asking is because im not around my car and cannot look at the actual manifolds myself.

I can't remember but i feel like the manifold looked a lot more like the Tii one on this webpage, can anyone confirm for RHD cars? I just remember the first runner being an odd shape:

http://www.my2002tii.com/oct_2001.htm

But in terms of my original question do you think the LHD manifolds should fit? It makes sense to me logically due to the part numbers now and the fact they are manifolds not headers which obviously take up a lot less space.

[02Les]

But in terms of my original question do you think the LHD manifolds should fit? It makes sense to me logically due to the part numbers now and the fact they are manifolds not headers which obviously take up a lot less space.

As the part # (11 62 1 265 449) for both LHD & RHD 2002 (2lts mtrs) is now the same, the answer must be yes.

Up to sometime in '73 (late?) all RHD 2002s sported the same exhaust manifold (11 62 1 251 037). Probably it's main difference from the one available now will be the lack of tapped holes for emission thingies required in the US.

[WBeaumont]

I thought about this too as i want to get my hands on an 02again manifold but wasn't sure if it would clear the steering box. They look really nice but every time i look at a picture i convince myself either way.

Has no one done it?

[felix_666]

But in terms of my original question do you think the LHD manifolds should fit? It makes sense to me logically due to the part numbers now and the fact they are manifolds not headers which obviously take up a lot less space.

As the part # (11 62 1 265 449) for both LHD & RHD 2002 (2lts mtrs) is now the same, the answer must be yes.

Up to sometime in '73 (late?) all RHD 2002s sported the same exhaust manifold (11 62 1 251 037). Probably it's main difference from the one available now will be the lack of tapped holes for emission thingies required in the US.

This makes a lot of sense to me and is the answer i wanted to hear.

[felix_666]

I thought about this too as i want to get my hands on an 02again manifold but wasn't sure if it would clear the steering box. They look really nice but every time i look at a picture i convince myself either way.

Has no one done it?

At this point i cannot see any reason why this wouldn't work (02again).

But i am looking at a couple of others, the IE shorty header and a manifold made here in Germany.

[oz_tom]

Will, I got your email but have been busy... will get back to you asap mate..

Tom

[felix_666]

No stress dude, i'm not in a super rush, but thanks.

[Kile Brekke]

Coming in hot with the 12-year bump. I too, am curious if this manifold from my RHD Touring is the same as a ‘tii’ manifold and if anyone confirmed an 02again manifold fitment. I’m building a semi-hot motor and with the lack of decent header options out there trying to figure out what the best approach is. Not trying to melt any steering couplers every other month with the spaghetti banana style. Seems popular on the UK forum. The part number casting on my manifold does not match any of the above listed numbers. It reads (11 62) 1 251 039  

Note the hole near the #4 outlet where the pipes turn down. Seems unique? 

 

IE shorty’s won’t work. 02again seems ideal. 

 

 

 

 

[NickVyse]

in my experience all RHD 02 manifolds are essentially the same, and not interchangeable with any LHD manifolds. At a glance they look the same, but the exit points more towards the inner wing so the down pipe will clear the steering column, so I would hazard a guess that any of the shorty manifold replacements available in the states for LHD cars wouldn't work with the RHD car.

 

James at JFI in Wales has a 4 branch option for a RHD car: http://www.jficlassiccars.co.uk/PerformancePartsSpares/

[NickVyse]

To answer the second question, from close visual inspection RHD manifolds will flow exactly as per the Tii LHD manifold.

 

I thought the desire for a LHD Tii manifold stemmed from the US getting a rubbish standard version due to emissions. Rest of the World got the same "Tii" manifold regardless of engine spec.