Well, the worst word in the turning language has come upon on me and my beloved GSR. Yes, it’s Emissions Test time once again. The problem is that I have a '98 Integra Type R 5Zigen Exhaust on my '94 Integra GSR coupe, and when we took if off his ITR and put it on my GSR we needed to extend the B-pipe a couple inches. So we just made an extended B-pipe out of a piece of 2 ½ mm exhaust pipe that was about 3 inches longer then the cat. Now, my question is what kind of cat do I need to fill the gap? Is there an after market cat that would bolt right in and have the O2 sensor nut? Maybe from a Gen. 3 Integra nonGSR?

 

why not do the same again and weld the same lenght piece of piping onto the cat and bolt it straight in! then after the emissions test take it out again and put in the other one