Need A Quote- RFQ: L6 Engine Exhaust Manifold Flange

[mmmjboner]

This is an exhaust manifold flange drawing for a M20B25 BMW L6 motor for my '90 325i. The bore spacing is 91mm (I'm pretty sure). The drawing is mixed mm and in right now, but it is not a final drawing. I don't have exact specifications yet, just a rough layout. I don't even know what type of steel it should be made out of. My plan is to have someone cut this, then purchase a universal header kit and cut and weld until it's a complete long tube header.

Thanks!

Jeremy

[cam1]

Hi:
You could purchase the X gasket and reverse engineer, to verify the dimensions, or plot 1:1 and fit on the head. As far as manufacturing goes, I'd recommend matching the header material to the flange in order to be able to get a good weld. This part is a prime candidate for waterjet cutting, or plasma cutting the profile,bores, and then drilling the holes with a 1:1 template glued to the part.

regards

[mmmjboner]

Originally Posted by cam1 Hi: You could purchase the X gasket and reverse engineer, to verify the dimensions, or plot 1:1 and fit on the head.

I already have the new gaskets but there are unique; they are attached from the top down, so when I tried to measure them they splayed out a little bit. If that makes sense. I'm not too worried about getting them perfect. I can get them close enough failry easily.

Originally Posted by cam1 As far as manufacturing goes, I'd recommend matching the header material to the flange in order to be able to get a good weld.

I agree and was planning on doing so. I can't seem to find the universal header kits I remember seeing in a paper Summit Racing catalog, so I can't say what material I would want to use.

Thanks!

Jeremy

[theemudracer]

I laser cut many different header flanges. I can do this no problem including the bolt holes.

I need the DXF to be a 1-1 scale with no dimenision on the drawing.

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