I have seen similar cranks and basically "you get what you pay for !!!" There cast which tend to be week especially from the over seas manufactures because they dont have the metalurgy Experince we do in the US. Also they are not finished very well and usually have to be ground undersized to correct the sloppy machine work. sometimes they even need to have alot of mallory added to them to balance properly.

 

it also says "OEM iron crankshaft" and "CRANK MUST BE BALANCED, DOES NOT INCLUDE RING."

Yeah, so this is a stock crank with a 4" stroke? What LS1 OEM crank is 4"?

 

LS7, but I thought that was forged.

 

There isnt an OEM 4.125" stroke though

 

None that I no of. I Believe they are using The term OEM because it is cast like an OEM one...

 

looks like total junk, why base a multi thousand dollar motor off a crappy crank