I recently purchased a 1995 firehawk. The previous owner put on a set of pacesetter long tube headers and an off road Y pipe. He also gave me the "original" exhaust system. Looking at the exhaust manifolds I only see a place in one of them for an O2 sensor. I thought these cars used 2 oxygen sensors. The number cast into one of the manifolds is 10223614 RH. Do I have the wrong manifold?

 

I got a 95 Z28 and it has 2. Did he give you the original y-pipe?

 

In 1995, the other sensor was on the Y-pipe.