Has anyone tried these?
http://www.ghlmotorsports.com/Merchant2/me...gory_Code=PH-NT
They seem to have fairly short primaries compared with the factory heat exchangers.

How

That's a coincidence. I'll read Larry's thread.

Howard we used to install GHL header and mufflers on 911, they had tremendous fitment problems, also the mufflers would blow out at the seams because of shoddy welding.

Ive been told they have really made huge leaps in quality, also they always stood behind the product, replacing bad parts etc.

I can tell you that bought B&B and returned them because the two sides were different lengths and could not be installed without cutting and rewelding. They were terrible. I then installed the GHL. They fit perfectly and seem well made. I haven't used them to provide heat yet but their build quality seem very good.