Expert Opinion Needed on Exhaust Manifolds for N52 Engine

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09-21-2007, 01:58 AM

titanic

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My Ride: 2006 523i steptronic (delivered 22nd Sept. 2005) solid black, amethyst dakota leather, styling 124 18" PS2

I am thinking of changing out the exhaust headers from stock to one with sport cat to increase flow. But I am not sure if I can find the right one for my 523 which has the N52B23 engine. Does any knowledgeable person out there know whether the exhaust manifolds fitting are the same for all three variants of the N52 engine i.e N52B23, N52B25 and N52B30? Thanks.

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09-24-2007, 08:52 AM

sirch

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Quote:

Originally Posted by titanic' post='472595' date='Sep 21 2007, 03:58 AM

If you just want the sport cats why change the headers? I've bought 20 sport cats for $40. I'm sure you can could buy some and just have the local exhaust shop weld them in for you. You may not get my pricing, but I;m sure you could get them for less then buying a whole new header system. Just a thought.

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09-24-2007, 07:42 PM

xxterxx

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Quote:

Originally Posted by titanic' post='472595' date='Sep 21 2007, 05:58 PM

the exhaust manifolds sitting for N52B23,25 and 30 should be the same but RHD and LHD will not be the same....

i dont thinks theres any manufacturer that makes exhaust manifolds for the RHD N52 engine....