I've seen BMW headers on Craigs List for cheap, with the buyer warning that they don't fit very well. You have to pay for quality.

I have an E30, paid $300 because it lacked a title. They're simple cars with good aftermarket support, but motor swaps seem to get more interest than oem mods - usually a later BMW motor. The M20B25 is a 2.5 liter motor that makes 169 horsepower - I'm not sure how the hp is measured. To mod these to 200 hp or greater is very costly. A later small series BMW six will make 240 hp or more and is a bolt in and is as easy to live with as a Honda civic. Stock E30s are not costly cars to own and maintain. Add a turbo or supercharger kit and you can have 350 hp. And then there are LS swaps. There is a Youtuber named Kameron "Kamotors" is his channel. He was a high school kid that was given on old E30 - he didn't know anything about cars at the time, ten years later he sells quality turbo kits. I wish we had turbo kits for the slant six.

I have a set of MP six into one headers. I am thinking of welding on thick flanges. Those headers leaked.

Great looking pipes...the whole engine for that matter!

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DynoDave
1970 Plymouth Duster
1972 Dodge Charger Rallye
1977 Chrysler Cordoba
WPC # 12304