Exhaust System Upgrade Options Available for Turbo I4 AMG Engine Yet?

[675430VME]

Damn, I was thinking about tackling this install myself when I get back to the states, maybe i still will since removing the downpipe seems to provide better access to some of the exhaust specific clamps.

You can probably ask Boomgear to show you when you come visit. They are able to take it out very quickly if you know how.

 

[675430VME]

That should definitely increase volume. The downpipe is a major bottleneck.

Totally agree, in real life the difference is day and night but its hard to capture the sound without proper equipment.

 

[Aerie]

It’s just a page in the Lotus diagnostic software. They go to the page in the Lotus software, select the exhaust valve calibration and press go. The valve goes to full open, full closed and the car learns the new open/closed positions of the valve. That’s it, very simple with the correct software.
I believe the Milltek Exhaust valve controller avoids throwing codes.
I have a V1 Ti Aerie I4 exhaust. The valve arrangement is actually designed to match the OEM Valve’s open/closed positioning, but it still threw codes. Only the recalibration resolved it, no problem since. I also have their sports cat.

The V2 titanium exhaust system for the i4 and V6 has addressed the valve issues with a newly designed valve.

 

[F1 SML8R]

Quick update, my dealer ran the calibration while it was in for an oil change and all good (no more engine lights). He said basically the tolerances on the exhaust flap module are really tight. So, he's not surprised that it needed a calibration. He's done several apparently. Also, a few software updates.

Lastly, I went to a dealer that was about 80 miles away. So, after about another 160 miles of touring mode to burn in the exhaust packing, it sounds a bit "growlier" (is that a word???). I suspect like other exhausts, it'll be fully burned in after 300-500 miles. A big thanks to @Aerie for putting out a quality product. The tech said he hadn't seen the i4 version of any of the after-market exhausts (he's done a few v6's) and thought the titanium heat patina that was forming looked cool.