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2.5 exhaust. Can any improvements be made to the sound?

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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Sludgepump
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2.5 exhaust. Can any improvements be made to the sound?

Post by Sludgepump » Sat Jun 22, 2024 6:16 pm

Just want it a bit more burbly. Don't want it to drone.
Might be pressing the go button on a nice red 2.5 litre car quite soon and would appreciate the opinion of
anyone who's done such a thing.

Thanks

Dave
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flybobbie
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2.5 exhaust. Can any improvements be made to the sound?

Post by flybobbie » Sun Jun 23, 2024 8:05 am

I only use super unleaded, if i use standard i lose any burbles, especially cheap Asda fuel.

Although Asdas diesel recently improved, probably no longer comes from Russia!

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2.5 exhaust. Can any improvements be made to the sound?

Post by jenniferlouise » Sun Jun 23, 2024 4:49 pm

Yep, swap to a Remus system. Pepped ours up instantly… 😉 (burble burble burble)

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2.5 exhaust. Can any improvements be made to the sound?

Post by Big Andra » Sun Jun 23, 2024 8:34 pm

jenniferlouise wrote: Sun Jun 23, 2024 4:49 pm Yep, swap to a Remus system. Pepped ours up instantly… 😉 (burble burble burble)
Any links to where you got it?
2009 E89 2.5 Alpine white.
2008 cayman 2.7 Arctic silver.

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2.5 exhaust. Can any improvements be made to the sound?

Post by jenniferlouise » Sun Jun 23, 2024 10:37 pm

Big Andra wrote: Sun Jun 23, 2024 8:34 pm
jenniferlouise wrote: Sun Jun 23, 2024 4:49 pm Yep, swap to a Remus system. Pepped ours up instantly… 😉 (burble burble burble)
Any links to where you got it?
Absolutely. Bought it new from POTN Ltd in Wellingborough. Ask for Fin and, if you’d be so kind, name drop Andy.

I collected it and took the car and the exhaust a few yards to Motech Performance for fitting.

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2.5 exhaust. Can any improvements be made to the sound?

Post by Big Andra » Sun Jun 23, 2024 11:17 pm

jenniferlouise wrote: Sun Jun 23, 2024 10:37 pm
Big Andra wrote: Sun Jun 23, 2024 8:34 pm
jenniferlouise wrote: Sun Jun 23, 2024 4:49 pm Yep, swap to a Remus system. Pepped ours up instantly… 😉 (burble burble burble)
Any links to where you got it?
Absolutely. Bought it new from POTN Ltd in Wellingborough. Ask for Fin and, if you’d be so kind, name drop Andy.

I collected it and took the car and the exhaust a few yards to Motech Performance for fitting.
Magic, ta. I recently bought my Bilstein rear shocks from POTN as demon tweaks had sent me ones for an e85 and were adamant they were the correct ones for the e89.....they weren't.
2009 E89 2.5 Alpine white.
2008 cayman 2.7 Arctic silver.

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2.5 exhaust. Can any improvements be made to the sound?

Post by jenniferlouise » Mon Jun 24, 2024 6:56 am

It’s a good job the roof isn’t fixed… once fitted it doesn’t look too aggressive, with attractive tailpipes. I did have to go back with the Mercedes to collect the factory exhaust as I didn’t fancy a drive home with a whole system hanging out the top!
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Sludgepump
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2.5 exhaust. Can any improvements be made to the sound?

Post by Sludgepump » Mon Jun 24, 2024 9:32 pm

Thanks very much everyone. Some good ideas there!
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2.5 exhaust. Can any improvements be made to the sound?

Post by Marcoose » Tue Jun 25, 2024 2:19 am

OP, here’s how the pros do it.
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2016 35is, monoballs, camber plates, KWV3, PS4S, xHP, MHD, LFB pedal, flat bottom wheel, red indicators, black headlamps
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2.5 exhaust. Can any improvements be made to the sound?

Post by Nathanio » Tue Jun 25, 2024 6:59 pm

jenniferlouise wrote: Sun Jun 23, 2024 4:49 pm Yep, swap to a Remus system. Pepped ours up instantly… 😉 (burble burble burble)
Do you have any videos of it at all?
2010 E89 Z4 sDrive 30i

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2.5 exhaust. Can any improvements be made to the sound?

Post by javis20 » Wed Jun 26, 2024 2:29 am

You could try one of those fart can mufflers like kids put on their ricers...

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2.5 exhaust. Can any improvements be made to the sound?

Post by flybobbie » Wed Jun 26, 2024 7:56 am

I like the standard sound. Subtle without the ridiculous nails in tin can sound you get from F types or Porsche.

What we can't appreciate sat in the car is it has one of the best drive by sounds.
I would hear my colleague drive off in her car down the country lanes.
A few have said how nice it sounds driving off.

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2.5 exhaust. Can any improvements be made to the sound?

Post by matsmith749 » Wed Jun 26, 2024 11:50 am

BMW do make a louder exhaust for the e89 - fitted to the 35is as standard, I expect it will fit other models.

No idea on price, I expect a lot. In my mind's eye I think something like £2k?
From Jan 2023 2016 e89 Z4 35is / mineral white / coral red interior / all the extras
SOLD 2010 e89 Z4 35is / space grey / coral red interior / all the extras
SOLD 2007 e85 Z4 3.0 si sport / midnight blue / champagne interior

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2.5 exhaust. Can any improvements be made to the sound?

Post by B21 » Wed Jun 26, 2024 12:45 pm

matsmith749 wrote: Wed Jun 26, 2024 11:50 am BMW do make a louder exhaust for the e89 - fitted to the 35is as standard, I expect it will fit other models.

No idea on price, I expect a lot. In my mind's eye I think something like £2k?
The 35i and 35is exhaust systems have two feeds into the collector before splitting out to the final cans…N20/52 have one feed...the 35is has a louder exhaust than the 35i…

Not really technically or financially viable..
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup: Previously a slightly less modified Atacama Yellow 20i MSport :thumbsup:

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2.5 exhaust. Can any improvements be made to the sound?

Post by B21 » Wed Jun 26, 2024 12:56 pm

I used these guys on my 35is..but they do this kit for the 23i..

https://www.fox-sportauspuff.de/en/CAR/ ... Drive-23i/

Very good quality..lovely ‘tone’…

Not sure if you’ll need to do any cutting n shutting ..I assume if you buy all the parts it just bolts up..best to check..
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup: Previously a slightly less modified Atacama Yellow 20i MSport :thumbsup:

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