[cageyvet]

I don't know the answer to this yet ( I can't tear into my 335i until I finish doing the fuel system on my mazdaspeed 3) but snooping around today I was looking for exhaust manifold ideas that would work on the n54. Someone who had access to n54 the cylinder head could easily see if the exhaust ports on the e30 would match up directly to the n54 using an e30 gasket. If it matches up which I think it would this manifold could simply be reflanged and used on the n54. The manifold would allows proper o2 sensor placement and the collector leaves plenty of room to add an ewg with proper flow.

http://imagehost.vendio.com/a/126826...11221885_1.JPG

[cageyvet]

http://maxbimmer.com/forums/showthread.php?t=123578
http://www.data.bmrparts.com/qimages...6_926000_1.jpg
http://www.ebay.com/itm/BMW-E30-88-9...ceb693&vxp=mtr