Interest thread: AAM Competition 2.5" Axle Back Exhaust (Muffled)
 

https://lh4.googleusercontent.com/-n...XB%2520AAM.JPG

Hey guys,

There's been a lot of talk of designing an axle back exhaust to go along with our S-LINE midpipe, considering your only real options out there are to run the midpipe with 1)stock muffler (may be too quiet, not enough flow) 2) short tails (more than enough flow, but too loud) 3) other axle back exhausts

This is a drawing our engineer came up with to show you what it would end up looking like. The main focus is to incorporate mufflers within the confined space while maximizing flow, this will then mate up to the stock intermediate pipe, or our upgraded S-LINE midpipe.

Sound wise on a stock exhaust, this should be a hair louder. Mated to our S-LINE midpipe, will sound very comparable to many other true dual cat backs out there. The idea is to give you, the community, options! Modular, being able to fit one vs the other!

ETA: 2+ months out if project gets approved
Price: TBD

Any interest out there??

no

Yes.

Depends on the price

:iagree:Absolutely

No on the design and sound. In all seriousness, make your engineer useful and make something that isnt on the market, like say a single 3" back with an angle at the end. Take a que from how RS*r did on their concept exhaust systems. Little bends as possible, 12" resonater since the 370z will need it, slip fit tail section, with an angled N1 style, but not so blocky like most are, but were all the welds are on the can, rounding them off. Can post a pic of what I mean but you can do the same on google images. I have had this on my other ride for over 7 years and absolutely love it.

I know there are quite a few people that want a single sided system on here, but no one is yet to bring one on the market.

I think you may be missing the point as to why they are thinking about this. Their only axle back option is the short tails. Making an axleback that can fit on their new mid pipe design can serve a double purpose for them. Creating a single 3" CBE in comparison is all new.

This has also been talked about but the priority level isn't as high. It's definitely something we will develop in the near future, as I'm sure the sound it produces is promising and some will sacrifice the looks over performance/weight/sound! I agree with you 100%

Well said and right to the point. This axle-back will serve as a modular piece that will span across many platforms including the g37 coupe, and the fx35, with different tip lengths obviously. Building off of what we currently have, the S-LINE midpipe, and short tails, I think having a muffled options should make sense but just wanted to see what the community thinks!

I would buy on a serious note if it came with burnt tips like the short tails and also had burnt mufflers like amuse. just waiting for someone to make it.

Will work with all 4 of our current short tail tip variation :) that is the plan, no plans on burnt mufflers however

They already have a true dual CBE. Now they are creating another CBE with a H pipe design that can be bought in pieces, with multiple tail section choices, so as to not spend so much initially and can add as the money comes available. I fully understand, a new CBE. Hence why I said if you are going to design a "NEW CBE" make soemthing that isnt available yet. I am aware the shorty's and the mid section is already on the market, but when all coupled together it is another CBE.

Single exit exhaust already exists: http://www.the370z.com/canada/17687-...st-review.html

Well maybe a special custom order for a special customer ;)

The current true dual will be history. The S-LINE midpipe paired with short tails and/or this new axle back will span across many other platforms with slight adjustments. Instead of having just the true dual right now that only fits the 370z. That's the intent behind the "design" which all started with the S-LINE midpipe

I know where you are coming from, but it would be nice to see a single sided 3" at a decent price. Make a ton of mid sections that are "universal" and just use the tail section as the change from platform to platform. Not saying it doesnt make sense. Might even expedite the deliver time to the front door.

After looking, you even make a titanium one like the 370z amuse for the 350z , WTF gives?

That right there is what I am looking for. WOW. Good to know a unicorn does exsist.

^^^


It's coming, no worries!!

I would like to see this as well as the current midpipe in 70 or 75mm with 4.5" tips.

I'm interested as well I'm attracted to the gains of the s line mid pipe but afraid of how loud the combo with short tails will be with test pipes as that is part of my build plan.

It should be epic! I am tempted to jump on the train here, but I like my TDX too much right now.

bump:)

Our engineer drew out the fixture and it came in. We will be ready to make a couple of these to test fit them within the next month or 2 :)

Thanks for the reply Khoi. I would be willing to try it out with a discount...hehehe. I just got myself a DD so I would like something little louder, and more refined than the nismo axle back.

No.... Short tails aren't that loud.... Some people are just pansies... ;)

I'm just kidding... If the muffler makes the look a little bit better I may be interested....

With the "cross-over" design, it's going to be relatively tucked, but will sound much more tamed vs the short tails haha

When you say muffled, do you mean this will be a baffled design or straight thru?

They're straight through mufflers, same one we use in our current true dual systems, MOST round shaped (canister style) mufflers are straight through designed, some just have bigger chambers than others

Also I put muffled in the title so it's not to get confused with our short tails, which technically is an exhaust back exhaust, or a muffler delete

Depending on price I may be interested. What are the tip sizes? I would like the keep the tips same as nismo oem, 4.5 in.

gonna bump this. khoi - is there a lot of drone with the short tails and midpipe on the highway at say 70mph?

I will have the woman in the car for a couple 6+ hour road trips and I'd rather not give her a migraine. lol.

But - I could always ball out and get the axleback section for longer drives and rock the short tails for driving around town and piss all my neighbors off. I have been doing research and having a hard time understanding how loud these things will be and if they cause any drone in top gear.

Thanks! I'm keeping an eye on this thread.

Tip options will be the exact same as the short tails, so we have the 4" tips or the 5" GT-R tips, which fills the Nismo bumper much nicer
Midpipe + short tails is loud, which may even be an understatement. Understand that with the midpipe and short tails you have a 2.5" true dual system with no sound control other than 2 12" resonators in the midpipe. With the new axle back section it should be very tamed and toned out, with sounds comparable to our current true dual system and/or many others out in the market.

If you're concerned about drone, the midpipe + short tails is loud, and with loudness the drone follows. I'd hang tight and wait till this muffled section fully releases or in the mean time you can always grab the midpipe :)

Khoi, these look nice! No benefit in me purchasing one of these, but I am saving up for the true dual right now. A member might have it for sale for me.

ON A SIDE NOTE:What are your opinions on quad tips? Is there enough room on the rear valance to build this muffler and attach quad tips on those little holes?

Khoi, discard this if this question has already been asked but... why don't you guys build a full CBE instead of different composing pieces?

Modularity is the key

It all stemmed from when we first released the short tails, and how everyone wanted to complete the rest of their system but keep the short tails instead of having to sell it and purchase a complete catback. This is when we came up with the midpipe. The midpipe bolts up to the short tails AND the stock muffler, well with either combo you get an extremely loud set up, or a very stock-like set up, no in between. This is where a muffled rear section would come into play.

Also we currently do have a full cbe at the moment, it may or may be discontinued when this muffled section is fully released, that's to be determined

Can you hurry up and release it! LOL

interested in muffled dyno, in comparison to short tails. Also full weight specs of midpipe, short tails, and muffled. Track guys gotta watch their figure :tup:

Anything new on this? I'm interested in the midpipe, but worried it would be too loud with the short tails and test pipes...

We have talked to Khoi @ AAM about it.

If you already have the short tails and test pipes, then your car is already a 7 or 8/10 on a sound scale. Even if they are resonated TP's.

The mid-pipe isn't supposed to make the car actually louder, but it frees up more air and the car tends to have more volume/overall catback sound.

Id say the car will go from a 7/10 to an 8/10 with the midpipe.

I find it hard to believe that with a bigger pipeing there won't be a little bit more sound coming out the back..

Videos are welcome. Id like to see more vid with people rocking short tails and TP's haha.:tup:

I don't have any exhaust upgrades, yet. But the gains from the midpipe/short tails are compelling. I would prefer for the volume to be lower than that setup with test pipes.

So you just have the midpipe and shorttails?
Can you post a video of it please? A lot of us would really like to hear it!

I'm still stock, just interested in the AAM setup because of the gains. If I decide to get it I get some vids up.

AAM/Khoi - Can we get an update on this? I'm very interested in this as the short tails are just too loud for DD.