isnt that a three peice header?(Pipes 1&2, 3&4, and the mid?)
someone on the board has it...I remember the pics when they had it taken apart and painted.
edit*
Check with board member "mrfreeze5" I believe he has the same header as you.
+1 D&D got one on my bike. If you can weld or know someone who can weld the three pieces together, it makes getting in on the bike alot easier and also stops it leaking around the joins.
fzr660/400: fzr400 3en1 frame, 3en2 swinger, custom single seat subframe, fzr660 motor conversion, APE adjustable cam gears, full D&D 4-2-1 exhaust, falicon clutch basket, ignitech ignition, R6 front end with tz250 wheel, ohlins shock, storz steering damper, tzr250 rear wheel.
weighs 166kg wet (25kg lighter than my stock fzr600).