E32 B11 3.5 Exhaust wanted

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AlpinaB11Jay
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Joined: Sat May 01, 2021 10:53 pm

E32 B11 3.5 Exhaust wanted

Post by AlpinaB11Jay » Sun May 02, 2021 9:17 am

Hello,

Just joined i own a B11 3.5 auto, just going through a refresh stage and the exhaust has sadly let go. I have had a custom made exhaust but a bit too loud so after a original or any other BMW model that may share the same exhaust system.

After Cat back.

Thanks.
E32 B11 735i #046

CaesarBob
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Re: E32 B11 3.5 Exhaust wanted

Post by CaesarBob » Sun May 02, 2021 9:52 am

AlpinaB11Jay wrote:
Sun May 02, 2021 9:17 am
Hello,

Just joined i own a B11 3.5 auto, just going through a refresh stage and the exhaust has sadly let go. I have had a custom made exhaust but a bit too loud so after a original or any other BMW model that may share the same exhaust system.

After Cat back.

Thanks.
Have you tried ALPINA? No idea if they are still available (probably not) and the price will be £££ but at least you'd have a starting point.

Also, where are you based? Not many E32 ALPINAs left in the UK. It would be great to see some pics 8)
B3 3.2 TOURING #062

AlpinaB11Jay
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Re: E32 B11 3.5 Exhaust wanted

Post by AlpinaB11Jay » Sun May 02, 2021 7:23 pm

Based in Shropshire.

Yes, tried them not cheap but may be the route if no luck. I was told the M5 exhaust is similar but cant confirm that?

The B11 is in need of a touch up, rust in areas. Been standing for about 3 years so needs a refresh as well. Mechanically its sound after just having a head gasket and other bits done.

Got the front splitter freshly painted, hub caps to finish it off as well.
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E32 B11 735i #046

ScooBeeFive
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Re: E32 B11 3.5 Exhaust wanted

Post by ScooBeeFive » Sun May 02, 2021 10:00 pm

Very cool. I'm in Shropshire too - tis a big old county but I'll keep an eye out!
Paul

2013 F11 B5 BiTurbo Touring #135 - Alpina Blue
2004 Porsche 911 C4S

AG
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Re: E32 B11 3.5 Exhaust wanted

Post by AG » Mon May 03, 2021 4:21 pm

the original Boysen/Alpina exhaust for the B11 is no longer available, most got swapped for a std system when they rotted becaiuse the 3rd or 4th owner couldn't justify the cost.

I would imagine with the std system, on an engine thats covered some miles any reduction in power is going to be hardly noticeable, the system was free flowing but 'we did without the headers and its there that any power gain is felt.

I'd go std e32 735i with larger outlets on the rear box.
Former BMW CC 7 register chairman

1985 e23 B10 (sold)
1995 B3 saloon switchtronic (sold)

http://www.facebook.com/BmwE23AlpinaB8B9B10
http://www.facebook.com/AlpinaB3E36AndE46

AlpinaB11Jay
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Joined: Sat May 01, 2021 10:53 pm

Re: E32 B11 3.5 Exhaust wanted

Post by AlpinaB11Jay » Tue May 04, 2021 8:56 pm

AG wrote:
Mon May 03, 2021 4:21 pm
the original Boysen/Alpina exhaust for the B11 is no longer available, most got swapped for a std system when they rotted becaiuse the 3rd or 4th owner couldn't justify the cost.

I would imagine with the std system, on an engine thats covered some miles any reduction in power is going to be hardly noticeable, the system was free flowing but 'we did without the headers and its there that any power gain is felt.

I'd go std e32 735i with larger outlets on the rear box.
Thanks AG, so should fit fine? Yes tbh its going to be a sunday sunny drive out so performance is not a concern.
E32 B11 735i #046

hap
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Re: E32 B11 3.5 Exhaust wanted

Post by hap » Tue May 04, 2021 9:28 pm

If you still have the original back box or system many years ago quicksilver exhausts would make an exact replica in stainless steel inc baffles bore size. Not sure if they would do this but if so it’s worth a call if you still have the original

AlpinaB11Jay
Posts: 4
Joined: Sat May 01, 2021 10:53 pm

Re: E32 B11 3.5 Exhaust wanted

Post by AlpinaB11Jay » Tue May 04, 2021 10:37 pm

hap wrote:
Tue May 04, 2021 9:28 pm
If you still have the original back box or system many years ago quicksilver exhausts would make an exact replica in stainless steel inc baffles bore size. Not sure if they would do this but if so it’s worth a call if you still have the original
Thats what i have had done, a custom built exhaust following the original. Sadly its got a bit too much drone so thinking either adding in another box or fitting a standard E32 mid box.
E32 B11 735i #046

AG
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Re: E32 B11 3.5 Exhaust wanted

Post by AG » Wed May 05, 2021 5:48 pm

so should fit fine?
they're coupled to the std BMW manifold so should be fine.
Former BMW CC 7 register chairman

1985 e23 B10 (sold)
1995 B3 saloon switchtronic (sold)

http://www.facebook.com/BmwE23AlpinaB8B9B10
http://www.facebook.com/AlpinaB3E36AndE46

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