I ordered Oxygen sensors for my Ram 1500 1998 with a 360 and they sent 3 and said it takes three (front left/front right/rear) but there are only two on my truck (in front of and behind the cat converter)
I dont have dual exhaust , the left pipe crosses over into a single cat converter on the right side)
Aynybody know why they would call for three sensors?

 

A lot of the listings are wrong. Trucks with California emissions have 2 cats and 3 O2 sensors.
The parts you have are right, you just have to figure out which front O2 sensor is the right one.

 

Thanks Rabbler