Need exhaust manifold and turbo ID
 

I got a manifold and turbo as scrap that the guy claimed were off a tractor. Three pointed star on the manifold with the number 3521420701 (the 1s might be poorly reproduced 4s), with KKK turbo model 2699.
I'd like to find out what model engine this manifold is off, and what if any info is to be had on the turbo.

A starting guess would be an om352. Just going off the part number, lo and behold that engine actually exists. 5.7 liters...

How very odd- a six cylinder with four exhaust ports. That explains why I didn't find it, thanks.