whats up with these things? Are they soo crappy that they'll actually crack?

there are sub-$100 cast iron turbo manifolds on ebay right now. I can't figure 'em out. I know the cheap tubular manifolds crack weekly, but these iron ones?

 

I have yet to see a cheap cast iron turbo manifold fail, such as the mutek.
I do recall seeing a drag turbo manifold that had two hairline cracks.
I am not sure what exact manifolds your referring to, however you do sometimes get what you pay for

 

ive ran the ebay cast on my d series no issues. i also know a couple people who ran them no issues at all. i say its worth the money. pretty solid. def stay away from the cheap s.s manifolds tho

 

I've been around turbo stuff long enough to know that cheap anything tubular or steel is definitely "you get what you pay for".

hell, my entire modding existence has been based on that mantra....which is why these cheap ductile iron manifolds confuse me. Obviously they won't flow the best, but with some good ole fashioned dremel porting, they should be pretty good, and last forever.

 

^+1
could'nt have explained it better

 

weird?

didn't think any type of iron would crack easliy unless its a thin walls or low grade iron material?

or made out of lego matarial?

 

unless you have a 96-00 d16y7 stock exhaust manifold

 

or unless ur derka !!