Heeeeeey everybody.
The flanges were drawn from a set of the factory e90 manifolds I'm still using as a wheel chock to stop an old truck from rolling down my alley. They're in the master "here's my stuff" DXF linked here:
From memory mine were a little tight between two studs, but they fit and they work. The biggest challenge to adapting headers is the "neck-down" you can see in hoveringuy's post. These are necessary when using s54 header tubes for two reasons. 1. you've cut the old flange off, so the primaries are now too short and 2. the n52 gaskets aren't a flat gasket against the head... each primary has a waxy ring that sits around a short length of the primary that extends through the flange and into the head.
I tried as hard as I could to get my hands on aftermarket headers to check fit, but I was pretty confident that all the factory and aftermarket options for the n52 would interfere (severely) with the control arms and bushings. I hope I'm wrong!
The flanges were drawn from a set of the factory e90 manifolds I'm still using as a wheel chock to stop an old truck from rolling down my alley. They're in the master "here's my stuff" DXF linked here:
From memory mine were a little tight between two studs, but they fit and they work. The biggest challenge to adapting headers is the "neck-down" you can see in hoveringuy's post. These are necessary when using s54 header tubes for two reasons. 1. you've cut the old flange off, so the primaries are now too short and 2. the n52 gaskets aren't a flat gasket against the head... each primary has a waxy ring that sits around a short length of the primary that extends through the flange and into the head.
I tried as hard as I could to get my hands on aftermarket headers to check fit, but I was pretty confident that all the factory and aftermarket options for the n52 would interfere (severely) with the control arms and bushings. I hope I'm wrong!
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