Here's how the Tneer system sounds on our 45s. Seems a little deeper than the FI exhaust system and much louder than the Akra.

 

Gentlemen, I'm fresh after installing the CatBack exhaust from MG MotorSport (A45S).
It gets better but this is not it. I read the whole topic from the first page and I don't know anymore. Of course, I want to keep the guarantee.
Does anyone know about a new method that will leave a warranty and at the same time increase the volume of the exhaust without errors in the ECU?

 

the full MG system will not give errors

 

My Armytrix full system (200ceramic cell downpipe) no errors on MBUX car system.
Only error in the MB checking time but no problem.
I cannot send you all a video yet of my A45S because it still at service (3weeks!) waiting fir solution😒 the gearbox blocked after a gear recalibration. AMG plant suggests to replace some part ... waiting for it 😳.

Anyway some fresh Armytrix link :

Regards..👋🏼

 

Sounds awesome

 

It sounds like a totally different car. Unmuzzled.

 

I have the Akrapovic downpipe and catback installed.

Taken using a GoPro Hero 9 with the media mod casing and noise suppressor microphone cover, and the video was recorded with the car driven below 100 km/h and entirely on partial throttle below 4000 RPM.

Might have to listen to the in-car video with earphones for a more accurate sound.

 

Anyone know how to disconnect the wire to the exhaust valve? I want to see how the exhaust sounds when revving at idle with the valve open. Currently its coded to shut as soon as you begin to rev the car so it sounds pance when you rev the car.

 

It's just a latching plug connector right by the valve

 

thanks will have a go. I imagine I’ll disconnect the plug once i open my valve whilst the car is on?

 

That's a good question, I disconnected mine when the engine was off. Does it default to closed when the engine is off?
p.s don't forget to put rubber cover on connector to keep out the muck.

 

No idea but I assume it stays in whatever position it is in when you disconnect the control connector.

 

Photo of the valve and connector in this post:

AMG Dynamics

Hi guys, Does your car has 'AMG Dynamics' selector on the steering wheel? AMG DYNAMICS modes are named "Basic", "Advanced", "Pro" and "Master"

www.aclassclub.co.uk

 

Got the Akra on today, sourced and fitted (for free) by Ricky at RE Performance in Swindon. Top work by the guys as they'd not done a W177 Akra fit yet. The back box came with its own valve controller in situ but this then connects to another Akra control unit which takes a feed off the TCU which is also where the "artificial" bits get processed.

Sounds louder and bassier at idle with a bit more howl under load. Probably enough for me, I'd only add the downpipe if there was a decent performance lift but that seems to be not the case as per @changchewsoon

Its claimed to make another 8.5 HP so will see if it improves on my DTUK Map1 100 - 200 kmh time next time I get near an airstrip

 

Sounds great! Please share more pics if you have.

 

Maybe you read my post wrongly, I was saying that the dyno wasn't able to pick up any gains with the Akrapovic catback or the Armaspeed intake installed. I wasn't able to install the downpipe that time because the unit sent by Akrapovic didn't fit my car due to missing 2 bung holes for the extra sensors for post 2020 cars.

Akrapovic has then sent me the revised downpipe later and I have gotten it installed, but I wasn't able to get it tuned because of the pandemic lockdown in my country whereby the government only allowed the shops to operate until 6 pm.

I was late in sending in the car, and they had to wait for a while to let the downpipe cool down before removing it. The stock downpipe was really a pain to remove, and it took them much longer than expected. By the time we finished installing the downpipe, it was almost 6 pm so I only had the car on the dyno to do a pull with the same map to see the difference and I headed home.

Due to the time zone difference my tuner is 12 hours behind me, and in the past, I would book the dyno 8 pm/9pm my local time so that my tuner can remote tune the car which is 8am/9am his time. But now since the shops aren't able to operate past 6 pm, I'm waiting for a suitable time to put the car on the dyno again to tune it, most probably after our government has lifted the restrictions on operating hours.

With the downpipe installed, we could see that the turbo spools up much earlier and we gained some noticeable torque with the same current map I'm running before.

Hope this helps you in making an informed decision whether you would consider going with a downpipe in the future.

Also attached a picture of the stock downpipe vs the Akrapovic downpipe. My car is non-OPF version by the way.

 

The outlet of the stock cat looks like a restriction point, which may explain the gains from the aftermarket version.

 

A bigger exhaust is not always better. Velocity will be slowed, despite higher "flow".

 

A friend's car underwent a remap with M3P, I was there and took a video.

The car has Tneer 200 cell downpipe, Akrapovic catback.

Low rpm burbles, mid rpm and above combination of crackles, pops & bang.

The car sounded really pissed.

 

Hello, I am about to buy a decatted miltek downpipe but it states it’s only for vechiles without additional sensors?

this is what I want:

https://www.milltekexhaust-roadrunn...rbo-w177-hatch-only-particulate-filter-back-exhaust-non-resonated-ssxmz153.html

and then the downpipe

https://www.milltekexhaust-roadrunnermotorsport.co.uk/4124-milltek-sport-mercedes-a-class-a45-a45s-amg-20-turbo-w177-hatch-only-large-bore-downpipe-and-de-cat-inc-gpf-bypass-ssxmz155.html

I have a 2021 A45s and I’m from the UK. Will these two fit on my car?

can anyone give me any advice? Thanks

 

You'll first need to determine whether your car's downpipe is running on a pair of sensors or 2 pair of sensors. The easiest way is to look at the engine bay and see whether you can see there 1 sensor or 2 sensors at the downpipe.

If it has 2 sensors, then the Miltek downpipe will not be suitable for your car. If it has one, you can use it.

Secondly, you will need to determine whether your car is the GPF or non-GPF version. If it is GPF, you'll need a ECU remap to go with it or else the car will have a check light and the power will be restricted as a safety measure by the ECU.

As far as I know, UK models are fitted with GPF.

I've attached 2 pictures below, one with only 1 sensor attached and the other is with 2 sensors on the downpipe so you can get a visual idea of what I'm talking about.

 

Just checked my 2021 UK car and it has 2 sensor connections as per the second pic

 

Hi guys, in new to this forum,

I have been reading through this thread as it is something I am looking into doing but I am also from the UK and I only have got one sensor on my downpipe and there was people from UK saying they have got the 2 sensors ? Would someone be able to tell me the as to why I might just have the one sensor? ( Attached photo )

Thanks in advance

Matt

 

I’ve only got one on my 2021.

 

Ohhh ok I thought from what I read it was a UK thing with the 2 sensors I got 2020

 

Think you can see the sensor.

 

Finally got around to decatting my downpipe, however the engine light is on continually and there are no pops and bangs. My car has two additional sensors, how do I get around to getting rid of these engine light which is due to the OPF filter?

 

If you are running an aftermarket downpipe, it is advisable to get a tuner to supress the related check lights, even if you're not looking to tune your car.

 

 

Has anyone fitted a miltek downpipe with sports cat and gpf delete? Really interested to get some thoughts on this as there's not many definitive videos on YouTube.

 

Think I’m going down this route for more sound 👍👍

 

Yeah I've been following this guy. I wish I could hear it in person. The pops and bangs sound a lot more aggressive but I'm not sure whether the engine tone is aggressive enough for me. If your car has the extra temp sensor are you just stuck for now downpipe wise? Seems Miltek is out of the question if you have the extra sensor.

 

Just purchased my 2021 a45s. Has anyone in the UK done a res delete? Is it worth doing? This will most likely be my first mod to get better sound without voiding warranty.

 

Had a res delete done and the sound is mildly improved, pops from the exhaust are slightly louder and more frequent, otherwise little difference. Does anyone know what the back box modification is that pcw does? Or details of a modification that would increase the sound further? Thanks

 

I’m going to see Paul on the 19th April for mine to be done. For £300 odd I don’t think you can go wrong, unless the exhaust falls off.