[elprincep]

Hi! I want to change the exhaust of the M240i because in my opinion it sounds too little (very nice but little). My first option was to remove the particulate filter but I would have to touch the ECU and my car is still under warranty so I have discarded it. So I'm looking for a GPF back exhaust not too expensive and I found this Scorpion: https://www.scorpion-exhausts.com/bm...-valve-daytona
Would it change the sound of the car a lot or would it be a subtle change? I have also looked at Milltek but they are a lot more expensive.... What do u think I should do?

[eli371]

most reputable brands should have a video on YouTube showcasing the sound. I'd spring for Milltek if it was me.

[Lupeskew]

Your first mod should be a valve controller. Easy to install and does not effect warranty. You can control how far your flaps open. I have them open on my m4 to 100% almost all the time but can press a button and put in OEM mode and quite it down. I'm buying one for my wifes M240I we are ordering. It made a huge difference for me. As a side note, even when you are in Sport Plus the OEM vales only open to a maximum of 70% so you have more sound you are missing out on. I bought the SST valve controller as it's half the price of others and does a perfect job.

[Fronzdan]

Originally Posted by Lupeskew

Your first mod should be a valve controller. Easy to install and does not effect warranty. You can control how far your flaps open. I have them open on my m4 to 100% almost all the time but can press a button and put in OEM mode and quite it down. I'm buying one for my wifes M240I we are ordering. It made a huge difference for me. As a side note, even when you are in Sport Plus the OEM vales only open to a maximum of 70% so you have more sound you are missing out on. I bought the SST valve controller as it's half the price of others and does a perfect job.

I didn’t know it was only 70%!

If you have Bimmercode/Bimmerlink and a compatible dongle, they are telling me they hope to release a Bimmerlink interface soon where you can control the flap in a CarPlay/Android Auto app right in iDrive.

[Lupeskew]

The SST valve controller comes with a remote. What I did on my M4 was program 100% open flaps to one of my homelink buttons on my mirror....then I programmed the OEM mode to the other homelink and left the third homelink for my actual garage door. Super easy to switch the mode from your mirror.

[elprincep]

Originally Posted by Lupeskew

Your first mod should be a valve controller. Easy to install and does not effect warranty. You can control how far your flaps open. I have them open on my m4 to 100% almost all the time but can press a button and put in OEM mode and quite it down. I'm buying one for my wifes M240I we are ordering. It made a huge difference for me. As a side note, even when you are in Sport Plus the OEM vales only open to a maximum of 70% so you have more sound you are missing out on. I bought the SST valve controller as it's half the price of others and does a perfect job.

Wow, another think i didnt know xd, thanks! and that 30% really makes a significant difference?

[7ssainf]

You could consider a downpipe as an alternative.

Below vid has OPF and 200 cel downpipe and it sounds much louder than stock

[Lupeskew]

Downpipes are unfortunately frowned upon for any warranty work during warranty timeframe. I would not recommend.

[elprincep]

Originally Posted by 7ssainf

You could consider a downpipe as an alternative.

Below vid has OPF and 200 cel downpipe and it sounds much louder than stock

But i would need to modify the ECU to install a downpipe?

[7ssainf]

Originally Posted by elprincep

But i would need to modify the ECU to install a downpipe?

No. ECU wont need to be touched. Catted downpipes would not show CEL. Catless would

[elprincep]

Originally Posted by 7ssainf

No. ECU wont need to be touched. Catted downpipes would not show CEL. Catless would

Hi! Ive found this item: https://www.leib-engineering.de/leib...w-m240i-g42-en

which apparently I can use to remove the opf without touching the ECU (so maybe in that way I would not loose warranty).

Anyone knows about it? Is it a better idea than modiifying the ECU?