I've been running the Border rails and 850cc's on my Z for a couple months now with ZERO issues. I never imagined these bad boys could flow like they do and still give a perfect idle (with the proper JWT 850 program). From what I understand (and from eyeballing the fuel rails side by side) the Border rails are not high-flow. Yes they look beautiful but the inlets and outlets are nearly identical to stock rails so I wouldn't make that a primary reason to upgrade to the Borders. The other thing you mentioned was the AFPR and from what I have heard on here people say the Aeromotive and SX AFPR are the same exact unit so I'm not sure why one would be bad and one would be good. I'll let someone else who has first hand experience clarify that one though. But as for the Border's, if you think the 850's will benefit you then by all means get the Border kit... easy to install and fits perfect. Good luck!
