Building a custom header NA B6304

[gmtgmt]

Im putting a early 2.9 (3.0) 960 engine in a 1995 960E wagon that came with a 2.5 and M90 tranny

I got everything sorted out only have a small qoustion.

I would like to put a header on along with a costum downpipe and cat, to get rid of the dual layer pipes from the manifolds to the cat. this should be the best mod you can do to these without going +T

I know theres a header out there for BMW that will fit with slight mods but i want my own. I have a exhurst port flange from R-sport international.

Are there any thing i should take into consiteration when building one, i read somewhere that the pipes almost have to same length?

Any Input will be greatley appriciated

[JDS60R]

There is a lot of concerns when designing a header. You may want to mimic what is on there as the design is proven.
That aside - yes- you want equal length tubes up to a collector to keep the cylinders from emptying differently. An anti reversion collector is also a good idea.

I don't think and improved exhaust will help greatly but it doesn't hurt. I find the restrictions are usually in the cat conv or the resonator.

But before I look at exhaust I would see what is available for cams.

[precopster]

I have some early cams (150KW or 204hp) that I'm happy to part with for the cost of freight from Australia.

If your motor is post '95 you'll have lower output cams

[gmtgmt]

Just to be clear.

im putting a First Gen Engine in with the good cams allready a really fine example of one of these engine, with a very good service history.

so this allready has the Early cams this is replacing the stock an slow 2.5 engine.

[precopster]

Thanks you are very gracious. Good luck with the project.