Quietest Boosted Exhaust?
 

So I've got Motordyne e370 shockwave exhaust and just put some Fast Intentions resonated test pipes in front of it. It sounds like it wants to kill someone at anything over 3500rpm.

In short, it's too damn loud for me. Plus as soon as TG's kit gets here I'll finish up my tune and will be moving even more air through so it's not going to get any quieter.

ART pipes won't really be any quieter but will be a lower tone so won't sound as crazy.

Or if I got Fast Intentions exhaust to out behind their pipes will that be quieter? I've only heard the FI exhaust once and that's on Cooltoys's ride which is NA so while it is a lot quieter than Motordyne but not exactly a fair comparison when Boost is added into the mix.

I could see about getting a third pair of resonators cut in I guess. Basically I have two sets if you count the Motordyne snot chambers, and then there is the central x-pipe muffler.

What are you guys running? I'd love to figure this out sooner than later and suggestions are more than welcome.

Thanks!

My Invidia seems pretty quiet.. I am noise averse as well unless I'm on it... Its only 60mm though so slightly undersized compared to the FI. It's also an OEM-style design so the pipes make sharp bends just before exit.

The FI test pipes are 2.5" and the Motordyne exhaust is 3". I guess being Canadian I should know how many mm that is but, well, lol

Holy crap the motordyne is 3"?!?!? That's crazy. I'll bet that is loud.

60mm ~ 2.36"

I have a full 3" AAM from the turbos back. Resonated Downpipes and true dual set up. It's quite enough to have a conversation while driving down the road at 80 and opens up when you get on it. Love the tone and volume. Zero complaints. I have one short video of how it sounds from inside the cabin with the windows down. Hope this helps !

https://youtu.be/0vK0HrwLx_4


Sent from my iPhone using Tapatalk

In the same boat right now mate.

I have Motordyne CBE, blew up Cats, installed TPs which ended up stuuupid loud, installed generic 200cpsi Cats near the back after the centre X-muffler, which helped but not enough.

This is a bigger issue for us with non-Turbo setups as Turbos naturally quieten down that noise.

Now it's killing me but I'm considering letting the Motordyne go for something else... I bought a 370 for this exhaust!

I had motordyne with art pipes, test pipes and HFC. I also had invidia with test pipe ad FI with test pipes. The invidia is the quietest than FI and motordyne is just stupid loud

And motordyne is way over priced

I got mine for an absolute steal years ago, brand new, so price isn't the issue.

Interesting you mention the Invidia, I was looking at it a few days ago and just yesterday I've started looking at the Injen one which seems even quieter, and I'd love to do the 'Quad' tips style like in this clip:

https://www.youtube.com/watch?v=7I5LvlwwVsE

Whatever I end up with, absolutely refuse to have any hiss or rasp... one of the big reasons I went Motordyne initially.

Let me put it this way.. motordyne with art pipes when na you still have hiss and a tad rasp and loud as Fock..
FI with test pipes has hiss. Invidia with test pipes no hiss or rasp and is in my opinion built way better than Motordyne. I have owned over 6 exhaust and my favorite are FI and Invidia.

With the Motordyne E370 & Test Pipes I currently have on, yes it's stupidly loud, but even louder due to the SC pushing way more volume of air through the system.

I don't have hiss, but I do have rasp now since ditching OEM Cats and going with Test Pipes.

I'm not a fan of the two Invidia mufflers on top of each other near the end, 'horizontal' if looking from the rear, how the exhaust has to make a 90deg turn to enter and like a 60deg to exit. May not be an issue in an NA application, but for an SC where you're looking for everyway to increase flow efficiency it just doesn't rub me the right way. At least Injen is more traditional with two standard 'inline' mufflers at the end.

Not sure yet about the Invidia, but the Injen exhaust is 60mm, which is like 2.36" or might as well be just 2.25", which should be a great help coming from the 3" Motordyne.

I'm not boosted but I can tell you my FI exhaust is quite a bit louder since the ECUTEK tune, so switching to FI might not help much. And I have stock cats and 12" resonators.

The AAM mentioned above sounds nice...

Stock cats will be by far the best sound dampener you will find. Unfortunately they will blow out on you with a sc.

I did some intense studies on this and can tell you first hand that, also unfortunately, the cnt exhaust with art pipes will be the quietest possible setup. The quality of the cnt is below average but the cost might off set that. I went to that after I got sick of the drone from my fi w/18" resonators. Yes, I'm getting old. Yes, it made it sound good to my old ***. It will rob you of a few hp but when your making over 500 that didn't matter as I enjoyed my car more than if I had my 5hp back.

That's the setup I will put on if I ever buy a Z or G again.

Research will tell you the same thing. The guy I sold my cnt to swapped it in for his fi also since he wanted a tamer sound. He hit me back saying it was perfect.

Also, you could go with a nismo can.

I had a CNT on my 2011 and I loved it =)
It is also a 60mm exhaust I believe, but is the higher flowing layout like HKS/FI/etc.

Dirt cheap too. Dayum...

CNT RACING 09-13 Nissan 370z Bolt on catback Exhaust system (non Nismo model) , 370 exhaust, 370z catback exhaust, 370 performance exhaust