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      05-06-2015, 05:55 PM   #1
SebastienDS
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1M Exhaust upgrades

Hi,

Which exhaust do you guys recommend?
I was guessing akrapovic? But the full system is around 4000EUR right?

Any advice?

I'm new to aftermarket exhausts.
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      05-06-2015, 06:53 PM   #2
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Full Akra with wireless or nothing IMO. Especially with the downpipes, you've got urself a different animal
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      05-06-2015, 07:26 PM   #3
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Check out the Lightweight titanium system, sounds awesome!
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      05-06-2015, 09:13 PM   #4
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My opinion; Dinan's exhaust
You hear more of the turbos than the engine. It's quite a bit quieter.
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      05-06-2015, 09:40 PM   #5
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I just installed N55 mids. I was surprised at how much it improved throttle response. Also made a mild change to the exhaust tone- less diesel, more sports car.
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      05-06-2015, 11:33 PM   #6
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GThaus is the best in m opinion
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      05-06-2015, 11:35 PM   #7
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Quote:
Originally Posted by III Caruso III View Post
My opinion; Dinan's exhaust
You hear more of the turbos than the engine. It's quite a bit quieter.
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      05-06-2015, 11:42 PM   #8
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HMS
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      05-07-2015, 07:25 AM   #9
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Most of the better-known exhaust manufacturers sound great on the 1M. My personal favourite - HMS

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      05-07-2015, 08:51 AM   #10
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+1 on the HMS as far as sound quality!
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      05-07-2015, 09:42 AM   #11
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Reach out to ALEJANDRO he is installing the HMS and will likely have vids. It functions much like the Akra w a "wired" remote control valve. It isn't titanium, so slightly heavier but EVERYONE says it sounds amazing.

They are built to order, check w/ Adam at GMP Performance
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      05-07-2015, 12:35 PM   #12
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Okay so I'm looking at Akra and HMS.
I got my eyes on a used 1M and it already has the akra so that could be the deciding factor, however it costs like 8k more than the others I'm looking at.

It has also got the Mperf steering wheel w/display and a Wagner Intercooler.

Pricing for the HMS? In Europe?
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      05-07-2015, 11:27 PM   #13
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Quote:
Originally Posted by SebastienDS View Post
Okay so I'm looking at Akra and HMS.
I got my eyes on a used 1M and it already has the akra so that could be the deciding factor, however it costs like 8k more than the others I'm looking at.

It has also got the Mperf steering wheel w/display and a Wagner Intercooler.

Pricing for the HMS? In Europe?
Not sure about the pricing in Europe, but here in the US I believe it is slightly cheaper, so I would only assume that would be the case where you are located at as well. As others have previously mentioned, the sound is amazing, easily the best in my humble opinion. Also, although I can't remember exactly whom, but someone on the forums installed one on their car not too long ago and the hp and lb/tq. gains were quite impressive, at least as far as gains from an exhaust system alone are concerned. Whereas Akra is around +5 hp & lb/ft. the HMS was somewhere in the neighborhood of +15 each or slightly more. As for weights I am not sure regarding either one. Although, it seems that I read somewhere some time ago that the difference in weight between the stock axleback and the Akra axleback was relatively small, with the Akra being only marginally lighter than stock. Don't hold me to that, however, as I could be confusing it with another brand or some other type of bolt-on altogether. Of course the Akra is very well constructed and high quality being that it is made of titanium, but I still wouldn't take it over the HMS if for no other reason than the sound alone. The hp and torque gains relative to Akra are just the icing on the cake if you will. And as also previously mentioned, the HMS has the wireless option/feature just like Akra. To me, the only thing the Akra has on the HMS is that it is made of titanium, although the HMS is still a quality piece in its' own right even though it is made of stainless steel instead. If you do end up going with the Akra, it should also be mentioned that you have a choice of either titanium or carbon fiber tips. The titanium ones will turn yellowish over time due to the process of heating up and then cooling down, so that is another thing to consider as well.
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      05-08-2015, 03:31 AM   #14
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^^^Agree with above. I've had the HMS rear exhaust and midpipes for about 18 months. Saw a gain of 18rwkw (about 24hp) with no other mods. Same dyno, same operator, but it was on different days. Probably the mids contribute most of this gain as they delete the secondary cats. Price in Europe is about 2.5k euro.

Akra sounds more unique. HMS is outright aggressive. If I had to have titanium, I prefer Lightweight's Titan exhaust.
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      05-08-2015, 12:55 PM   #15
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AKRAPOVIC!!

best build quality,
best looking, best sounding for me,
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      05-08-2015, 04:27 PM   #16
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A lot of people are recommending HMS, does anyone have any feedback on HMS vs GTHAUS. I currently have gthaus with n55 mids and really like the booming sound it provides, but im looking for more burbles so i will be swapping the n55s for maddads.
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      05-08-2015, 07:31 PM   #17
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To the OP, this question is too difficult for a straight answer. I think you need to work out what is most important to you in an exhaust and eliminate from there:
- price - valved and titanium exhausts are the costliest. Remus with n55 mids is a great entry level.
- weight - any titan exhaust
- build quality - all seem pretty good
- hp increase - bonus really. Just don't pick one that loses power!
- tip design - too subjective
- resale - akra
- noise flexibility of valved exhaust - akra and hms, hence the higher cost. There may be other valved exhausts out there (I remember seeing one made in Italy but can't recall the name).
- sound - again subjective
- ??

Bear in mind that by changing out the mids and or dps that the sound/tone of the rear can change quite a bit. Unless you have heard a particular combination then it's a bit of a gamble I'm afraid. Some owners also have great success with swapping dps and mids and leaving the rear stock.

Work out your needs and your budget, then you'll find your exhaust.
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      05-09-2015, 01:15 PM   #18
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While there might be different preferences in sound, the HMS is in my opinion far superior than the Akra aesthetically speaking. the beauty of the HMS is that preservers the original looks of the OEM exhaust, but makes it more aggressive looking.

The akra is nice too, but the tips designed for the 1m are nowhere near the ones of the m3, m4, m5 or m6 models, despite you pay a similar price for the exhaust.

I just hope that the tips Akra design for the m2 are as nice as those of other models and akra 1m exhaust owners can replace their current tips for the m2 at some point.

of course there are other options such as meisterschafft but I honestly do not know much about it.

just my opinion
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      05-09-2015, 02:49 PM   #19
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I ordered Akra for my 1M about 8 months ago and I was told that they only have 1 full system left in stock and they'll be discontinued. You can double check.
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      05-10-2015, 06:16 AM   #20
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On my build thread, I have some photos of the HMS exhaust being installed that would give you an idea of the fit and finish. I've had it since 2013 and no regret. The sound is excellent.

http://www.1addicts.com/forums/showt...=734281&page=9
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