E30 Zone

Does anyone know if the inlet manifolds on the 325 engines are all the same or if there are some that are different?

All the same mate!

well the guy who's fitting the engine is saying there different, and thats why i've been waiting since tuesday for the car.
Ill have him tomorrow!

There's no difference accross the 325i range.

325e's had a different one as did 320's and 323's but all 325i's have the same manifold. I have about 6 here if you need one!

would there be any benefit from changing 325i manifold to 325e and will it fit ok without problems

popupstands wrote:would there be any benefit from changing 325i manifold to 325e and will it fit ok without problems

Why would you want to do that?

popupstands wrote:would there be any benefit from changing 325i manifold to 325e and will it fit ok without problems

Why would you want to do that?

someone was advertising on ebay that their was power gains fitting a 325e Manifold, I don't know if true or not

popupstands wrote:someone was advertising on ebay that their was power gains fitting a 325e Manifold, I don't know if true or not

Most definately not, the 325e inlet is much more restrictive than the 325i one. It would work the other way round though if you happened to own a 325e and wanted to fit an "i" manifold

E30Adam wrote: It would work the other way round though if you happened to own a 325e and wanted to fit an "i" manifold

Not unless you ported the head to match

Andy335Touring wrote:

E30Adam wrote: It would work the other way round though if you happened to own a 325e and wanted to fit an "i" manifold

Not unless you ported the head to match

Yes you would need to do that to do a proper job.

It would still give small gains over the eta manifold though.