Computer wont go into limp mode (or similar) or lose power with the ECU not reading the the O2 Sensors correctly (assuming long tubes with high flow cats)?
I mentioned this in another thread... the bolts on the flanges connecting the manifold and y-pipe on the passenger side are massive bent (yeah those thick ass flanges out toward the mounting holes are bent), even the flanges are bent, like someone massively over torqued them, is this common from the factory?
On closer inspection the top rear most manifold bolt does not look like the others... there is no rust or oxidation on it... all the others have some kind of oxidation... me thinks this one has been replaced,
Only had the truck for about a month so I know nothing of its history.
Do you plan on installing long tubes and a
y-pipe with a single muffler or are you going with long tube headers with true duals and two mufflers. Just curious.
Now, for the oxygen sensors. Most long tube headers have the bungs installed for the upstream O2 sensors and it's up to the end user to decide on a y-pipe or true duals. No matter, if the downstream (after-catalyst) oxygen sensors are not installed the check engine light will be on. If you decide to go
cat-less you will need some custom tuning to turn off the downstream oxygen sensors and eliminate the MIL.
If you wanted to leave the downstream oxygen sensors installed while being cat-less at the same time you could try a pair of the 90° non-foulers.
Either way, the PCM will not go into limp-mode because the downstream oxygen sensors are not installed.
Also, the exhaust bolts you speak of are normally super tight from the factory.
