pretty sure its 1&4 and 3&2Hotshot is
The header pairs cylinders 1 and 3 with 2 and 4 to create an interference branch in addition to the normal, tuned length of the unpaired primaries.
This header have the o2 sensor on the cilynder #2, maybe is a HS gen #1....where did they show the o2 sensor? the old hotshot header Gen 1 hit the alternator unless you got a shorter sensor. the bosch hit the thing. the wrapped header above shows no sensor???? mmmm.. Most headers are now knockoffs of the hotshot gen 1. The newest hotshot is best for the GA16DE because you get the downpipe with flex joint that enters direct to the CAT. the old Gen 1 header used the old very small front pipe. it was stupid. I believe some of the other ones also used the old Nissan front pipe to the CAT. way too small. I had a shop make me a 2 1/4 pipe there for that old hotshot gen 1 header. now I have the gen 2 unit. much better fit also. o2 sensor is lots better now.
Chris 92 classic
it is a MFPITA, but there are bonuses to 1 piece. and as much as it is a pain in the ass, it can still be put on the car with the engine in the car.Problem with the OBX is, its 1 piece.
Ive never personally installed one. But ive heard its a PITA.
shouldn't be a problem in any way. ebay headers are listed as for the B13, but will fit a B14 the same. all OBD1 O2 sensors are precat, and a 2 sensor OBD2 system has one precat and one postcat, so the header works fine for both. which cylinder the sensor is on is irrelevent, unless you have issues on that cylinder.Regarding the O2 sensor on the B13 ebay header, will it cause any emissions problems? Does the fact that it takes the signal from only one of the pipes/cylinders cause any trouble?