Will header fit?

[4DRB16A]

Just wondering if this header will fit my 1991 Civic w/b16a obd0 with no problems. Also I remember reading somewhere where the 4-1 and 4-2-1 had its advantages and disadvantages, does any know?

Thanks!

 

[VTECPOWER]

4-1 = top end power, so best for b16.
The only one that will fit "no problems" is the hasport header.
OR You could buy one for a civic si w/dohc vtec or del dol b16, and have the o2 bungs welded into the right place, dont rig it to one on the downpipe, some say it runs fine, others it doesnt work so good, dont be cheap, do it the right way the first time.

 

[4DRB16A]

Or I could buy this header and take it to a weld shop and have them weld 2 bunges for the O2 sensors?

 

[VTECPOWER]

Any header you buy for a b16 in civic si or del sol, has one bung on the downpipe, and the obd0 b16 has them on the upper side, 2 of them, so you can have them weld in 2.