Originally Posted by MidwestJ
After talking with the local Dodge dealer and another muffler shop-I've decided not to mess with the Y-pipe.
Dodge dealer dissuaded me from changing it as did the muffler shop. Muffler man said he's done it before and the difference in flow wasn't that measurable. Plus-he said I'd be fighting a check engine light from then on out.
That is not true because all your O2 sensors are before the Y-pipe. You aren't messing with anything emissions related because it is after the cats....just helping out the flow. You have as much a chance of throwing a code from changing your Y as you do from changing your muffler. I did mine about 6-8 months ago and no problems at all.
I think if you lay under your truck for a few mins it'll make sense.