December 12, 2005
I have decided to put dual 2.5 inch exhaust from my Tri-Y's back and because it is going to be about 300 dollars cheaper I decided I am going to eliminate my Cats. I am going to order the O2 censor simulators, but I was wonderin does anyone know how many I will need? It is a 98 GMC Sierra with a 5.7, any help or inputs on a better idea for an exhaust system than what I have. thanksForums : Exhaust : O2 censor question (116 Views)
![]() |
![]() |
1 | ![]() |
![]() |
December 14, 2005
You should only need 2 of them. They are for the 2 O2 sensors BEHIND where the cats would be.![]() |
![]() |
1 | ![]() |
![]() |