Trying to get my car smogged and need to replace my exhaust manifold. I need one off a DOHC Del Sol, but cannot find one anywhere. I'll probably get one off a 94-7 GSR and was wondering where the o2 hole is located...on the manifold or downpipe. The exhaust manifold is going on a 1st gen B16 in a 4G hatch.

Thanks in advance

 

94-99 gsr's have the o2 bungs on the cat, none on the header

 

To elaborate a bit...

94-95 GSRs have one 02 sensor on the cat only.

96-99 GSRs have 2 02 sensors in the cat.

00-01 GSRs have 2 02 sensors, one in the header one in the cat.