I’m getting the same Invidia Q300 axle back but I read that the midpipe Wong fit on my 2014 is250 fsport AWD... can you give me some advice? And will the midpipe cause a CEL?

 

with your midpipes and axle back exhaust, does it cause a CEL?

 

Just installed today. Noticed it was droning at 25-30mph local, and 78-80mph on the highway. Barely hear it when cruising on highway, but it is noticeable. I hear more of my takeda intake than the exhaust though. I will see how it is a few weeks later.

 

what exhaust gaskets / o ring type things did you use to install your exhaust and get no leaks?

 

It did when I had it on. Though not sudddnly, but over time, yes and I got it consistently...

 

Just installed a Q300 axle back on my 2017 IS350 F Sport.. and daayum this thing is loud! Take into consideration I've had the "same" Q300 axle back on my 2015 IS350 which seemed very tame in comparison. I just read about there being a newer version being the Q300 H which is supposedly louder. Pretty disappointed as I'm 34 and not trying to be "that guy" and have the mid-pipe waiting to be installed, but not now. Hmmm.. thinking about selling this.