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Audi 5cy turbo MC2 - High miles (probably 200k+), but made full boost (5 psi) instantly and ran strong. Has all accessories, radiator, and a quattro trans with torsen center diff. I don't have the stock fuel system, but I do have some parts I was collecting to megasquirt it. - $400
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weld-els and flanges to build tube header for the Audi, like a homebrew 034 manifold. The collector is already tacked up and I think I have a T3 flange with it. A few people have owned this stuff and never done anything with it. $150
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torsen rear diff from Audi V8 Quattro. The whole assembly swaps into 5000/100/200 ("C" chassis) based cars, and the diff itself can be installed in 4000/80/90 (Bx chassis) diff housings. includes axles, cross member, drive shaft - $200
Make offers. Shipping the engine is out of the question. The V8 diff, maybe. But I would hate you.