I went with a non resonated setup with stocks Cats tho.

what day R U having FI install? mine shows up tues. so taking old one out monday

I'm having mine installed at the F.I shop but my number hasn't come up yet. Once I know when my CBE would be finished I will set up an appointment with them.

Hi Guys - Sorry if this question has been asked before, but there are 342 pages now :)
I have a stock 2015, and i really like the sound of the FI setup. Im planning on buying the 18' resonated setup and keeping the car stock. I am just worried about the drone noise. Its my dd car and i usually drive at 70mph so thats about 2400rpm
How bad is it? i couldnt find on youtube any stock car with FI catbacks only, mainly all the videos are with HFC or test pipes.
Can anyone share their input or any videos?

Thanks!

0 drone.

I have 2015 with 18" resonators, everything else stock. No drone and absolutely love the sound.

You won't have any drone at all. I barely have any with mine with the 18 resonaters and non resonated test pipes. I'll post videos of the car with and without the test pipes on the dyno of you would like.

Thanks buddy! would appreciate if you could post the video to make a final decision on this :tiphat:

Zero drone. Sounds almost stock until you put a load on the engine. Going up a hill will cause an increase in the sound level but it is a nice deep tone. You will love it! Watch my video to get a real life sound experience. My Z is also a DD and the new sound just makes it more fun to drive.

http://youtu.be/FgwIDniQ7as

So this is with the stillen gen 3 intake and fast intentions 18 inch resonated cat back. Obviously this is under full load but you can tell its nice deep and smooth but in no way too loud. Since I've installed mine I've made multiple 6 hot trips in my car with no drone on the interstate. Oh yeah she put down 306 on a dyno jet. This is SAE corrected.

http://youtu.be/R5UrCAHWQhc

So this is my car after adding the fast intentions non resonated test pipes. It's louder yes but not nearly as much as I was afraid of. There is some rasp under full throttle but it's really not bad at all. I imagine with the resonated test pipes there wouldn't be any rasp at all. So things to note, the car made and additional 11whp to a total of 317whp. More importantly saw gains all the way through the power band in the range of 20whp and 15 ft/lbs of torque. Torque was 265.63. I do love how the car has a bit of that growling back fire when I let off the throttle under load. Oh and when I saw a little flame shoot out of the exhaust I had the biggest smile. A/f ratios are spot on. Once I install my Z1 ported plenum and ported lower intake manifold I will be getting an ecutek tune. I'll have dynos for each addition. I hope this helps guy and major props to fast intentions. Their is no one else I would rather do business with.

Oh and these are the first videos I've ever uploaded here. If there are any issues please let me know.

Thank you for the repost and sorry about that. The first video is with the 18 resonated cat back and stock cats.

The second video is with the non resonated test pipes. Playing the videos back to back you can really hear the difference.

Thanks for the videos!! made up my mind .. putting down the order :icon17:
Now its the matter of patience till it arrives :rofl2: