JOSH13

I am installing a set of headers and off road y pipe on my car . I already ordered O2 extensions for the front . Will it run ok with the back 2 O2's in place or be able to get tuned out later on or will I have to gt simulators thanks .

JOSH13

I guess nobody on here ran their car with an off road y and left the stock O2's in place .... ??

lsjuanmike

iTrader: (2)

I think everyone ignores you because the search button would find 50 pages with the answer

Get them tuned out and leave them in if you want. O2 sims work also, but why bother.

udienow

iTrader: (18)

The rear o2's do not matter, you can delete them completely. But you will get a check engine light for it.