As many of you know, I have been porting since 1972, and specializing in Ford products, but branched out to anything needed, even tractor heads, even four cylinder, six cylinder, and SOHC/DOHC late model heads, etc. I thought I had ported every Ford cast aluminum intake that has a Ford part number on them, until last month. I now have had two C6AE-9425-K "Sidewinder" intakes to flow and work on. I had never seen one of these, and I have ported a lot of -"J" Sidewinders over the years. These two "K" intakes average 338-339 cfm as cast. That is better than the "J" intake by at least 30 cfm, and 40 or more better than the -F. Better than a Performer RPM as cast, and better than the BT as cast. How many of you actually have one of these? Supposedly came on a few real 427 Fairlanes, and 427 Cobras, but I have not verified that at this point. I would be interested in buying one if I could find one reasonably priced to add to my collection. Joe-JDC