Will somebody explain to me, when you put two high flows in they replace the 4 stock ones. But the two that are taken out, and are not replaced what do you do with that gap? Do you just add a piece of pipe. I have an 2002.
Thanks

 

The 4 factory cats are removed and the 2 new high flows are installed in their place.The shop that installed mine positioned them between the O2 sensors,in the middle and added a section of pipe that has a boss to accept the rear O2 sensors,you must install the O2 sensors,or the O2 sensor eliminators or you will get a cel.The front sensors are what the computer read,the rear lets the computer know you have cats and they are working.Hope this helped,good luck.