These are the new 2" 4-into-1 one-off prototype headers that Pfadt Race Engineering has put together for us for the XB110 project... 4" Collectors, individual cylinders filled with the Haltech EGT sensors.
At this stage of the game we are less concerned with outright AFR readings, we need to keep cylinder temperatures controlled and all pretty close in line. Right now at 6500rpm, we are seeing over 1150rwhp through the TH400, with every cylinder within 1% of each other
Final HP should be somewhere in the 1350rwhp (1700'ish crank) on blower only. Then we have four nitrous kits on top if we need anymore...