Yes i did a search and came up with one thing, but it didnt help much. I also looked on homemadturbo.com, but nothing.

With a turbo manifold, can you still hook a high-flow cat? is it recommended?
any help would be awesome.

 

yes! high flow cat or test pipe, recomended

 

the turbo manifold wont affect the cat. if the downpipe fits into stock location and the cat is the same size as stock fitment shouldnt be a problem. just get a test pipe instead of high flow cat.

 

ok, wtf is a test pipe. I've heard about it, but dont actually know what it is.

 

just a thought! maybe he had one those cars with the cat right after manifold, am I correct?

 

a pipe that replaces your cat, straight flow.