tried installing these headers today... shop had to remove coolant line to get to the driver side header which took additional labor and coolant.
AND upper o2 sensor seized in my oem header. Have to wait till tuesday for o2 sensor to arrive.
shitty day for me
i would be running z1 header, fast intention resonated test pipe, motordyne y pipe with resonated pipe option (possibly HFC option if too loud) and tanabe y pipe back