Jeff_K said:I have heard that the ATS manifold flows a lot better than the stock one, so I wouldn't think that it would be a waste of time or money. I would, however, consider a B1-04 turbo as well before you decide on which one you are going to get. I just put one on and it is basically a direct bolt on. No changes to the downpipe or intercooler connections (you have to rotate the intercooler tube a little but thats it). This turbo has no "surging" problems that the HTB2 seems to have and will flow/cool as much if not more than the HTB2. There are a few guys on here putting down some big HP with the B1-04 and keeping EGT's relativley in check.
I have been talking to Lenny alot at Dynomite diesel because of the 600's arent quite a direct bolt on, and he says that the HTB2 (I think he said that the killer 64) and the B1-04 have the same compressor wheel and housing, only diffrence is B1 has the diffrent tubine outlet, 15 cm housing, and the charge pipe off the compressor housings are diffrent.