The droning is mostly due to the muffler (minus tips) being 14"...if I'm wrong just let me know. Everything else is ALMOST identical to the coupe. The coupe midpipe just has less acute bends and the coupe muffler is obviously larger and different design. So the muffler in combination with the sedan's single exit 63mm/64mm midpipe to exhaust is mostly the causing factor for the drone.

Read A LOT of reviews before choosing your muffler. I believe most users disliked the HKS axleback in combination with HFC's and coupe midpipe. If you don't plan on HFC's then you should be fine. A handful of people also liked the sound + gains of the Stillen gen1/2 but didn't like the drone.

I will eventually "invest" in Motordyne ART pipes, Motordyne XYZ pipe + HFC, and then do a custom y-back exhaust.

Wouldn't you have a CEL if you were running gutted cats?

the so called "technician" at my infiniti dealership said that the coupe midpipe would not fit due to the hangars being in different locations and it being shorter. I told him he was wrong and that I still wanted to buy it he told me it would be a couple hundred dollars(days before I was quoted by his boss 250 for the entire coupe exhaust which I did not need) so I told him I would get back to him later and walked out. Before I do that I want an HR Y-pipe though

Haha. He's an idiot! Tell him the entire internet is laughing at him now.

No, I never have had a check engine light. I also passed NC inspection this year. The owner put a 05 ECU so it's probably getting around it some how.

Will the Coupe test pipe & resonator tone down the noise in the car? And will it be the sound I want?

Huh

Ok... oem cats, oem y-pipe, coupe mid-pipe and oem rear section is what I have.
Sounds better than stock, deeper, slightly louder but still a very very mellow sound.

To improve on that sound, an HR-Y pipe and HKS rear section and it sounds really good IMO.

Are you talking about how there's no check engine light or that there is a 05 ecu rplacing the 03?

https://g35driver.com/forums/g35-sed...mpilation.html


^ How did you miss this thread??? It's a freaking sticky....

Awesome! That's exactly what I'm looking for. I'll have to tell them to put a Coupes mid-pipe in. I go in the morning to the shop.

Yes.

Are you buying a coupe middy new? Don't do that, they're cheap used.
I got mine for $50

Thanks for the thread

Are you absolutely sure your cats are gutted?

I would think if they were, that CEL would be lit up brighter than Vancouver after a Canucks loss.

(sorry, I had to go there ).

I'm not sure how they got the 05 ecu to work for the 03.

No, the shop has 2 used and I'm going to try to get one of there's.