Rear muffler needed
- Thread starter royal3po
- Start date
mdf
Active Member
Muffler
Have you tried a BMW dealer?
I sourced a rear muffler from a dealer a year or so ago. I was amazed when they said that they had one.
-MF
Have you tried a BMW dealer?
I sourced a rear muffler from a dealer a year or so ago. I was amazed when they said that they had one.
-MF
Bwana
Well-Known Member
With the greatly weakened Euro, buying an OEM from overseas from Walloth&Nesch may be more affordable than previously thought. I got mine from them, albeit when the Euro was much stronger.
Hardly Used Exhaust System
I am in the process of upgrading my Coupe to Stainless Steel and will have both mufflers from BMW available around the end of June. I only have about 1,000 miles over the course of 1-2 years on them and they will be available in Oakland Ca. Since their install my Coupe has never seen rain and they are in very good condition. I would sell either or both for 65% of their list price.
PM me for additional details.
Regards, Jon
I am in the process of upgrading my Coupe to Stainless Steel and will have both mufflers from BMW available around the end of June. I only have about 1,000 miles over the course of 1-2 years on them and they will be available in Oakland Ca. Since their install my Coupe has never seen rain and they are in very good condition. I would sell either or both for 65% of their list price.
PM me for additional details.
Regards, Jon
Possible rear muffler substitute
The stainless systems (US) are based on Magnaflow cans for the rear.
Some report an added silencer in the can reduces the noise to near normal if preferred.
The Bosal site had the engineered drawings for reference and comparison to the possible use of Magnaflow.
The stainless systems (US) are based on Magnaflow cans for the rear.
Some report an added silencer in the can reduces the noise to near normal if preferred.
The Bosal site had the engineered drawings for reference and comparison to the possible use of Magnaflow.
blumax
(deceased)
exhaust systems
Remember--with an OEM mild steel exhaust system:
You can lenghthen its life by driving 10-15 minutes at speed to dry out the internals--the opposite being--if you drive a mile or two and shut down entrapping moisture within--the system it will rapidly go down hill by detioration from within by the by-products of combustion--they are very corrosive to mild steel.
It follows that most damage to exhaust systems comes from within--similar to goverments--such as California has endured for years--and now our Federal--the damage comes from within inflicted by corrosive elements (our politicians) such as we now have.
Remember--with an OEM mild steel exhaust system:
You can lenghthen its life by driving 10-15 minutes at speed to dry out the internals--the opposite being--if you drive a mile or two and shut down entrapping moisture within--the system it will rapidly go down hill by detioration from within by the by-products of combustion--they are very corrosive to mild steel.
It follows that most damage to exhaust systems comes from within--similar to goverments--such as California has endured for years--and now our Federal--the damage comes from within inflicted by corrosive elements (our politicians) such as we now have.
TomP
Member
Magna Flow
I just when through this 3 months ago, got tired of trying to find the Bosell, and the OEM was just too expensive. Looked up the specs on the magnaflow web site, then when down to my local exaust shop to make sure there was enough room. There's a 16" and 18" lenght option. I got the 18" length x 5.5" (or 6") diameter. Need to confirm the diameter of your in-take pipe and your tail pipe. Cost less than $100 ($80?) for the muffler and another $100 to install, they will have to create an attachment to connect the tail pipe to the muffer. The sound is great (not much louder than the original).
Tom
I just when through this 3 months ago, got tired of trying to find the Bosell, and the OEM was just too expensive. Looked up the specs on the magnaflow web site, then when down to my local exaust shop to make sure there was enough room. There's a 16" and 18" lenght option. I got the 18" length x 5.5" (or 6") diameter. Need to confirm the diameter of your in-take pipe and your tail pipe. Cost less than $100 ($80?) for the muffler and another $100 to install, they will have to create an attachment to connect the tail pipe to the muffer. The sound is great (not much louder than the original).
Tom
blumax
(deceased)
Muffler options
years ago when my original muffler gave up I installed a glass pack in place of the rear one on at least one occasion--and its sound was mindful of a nice boat exhaust--very nice to the ears--and when engine was "prodded" into a real song it spoke loud and clear.
Not too sure as to the neighbors outlook on the sound as I had to climb a steep hill past a number of them in those days to get to my home--but no one came out waving a gun or other weapon--so it must have been an acceptable song.
years ago when my original muffler gave up I installed a glass pack in place of the rear one on at least one occasion--and its sound was mindful of a nice boat exhaust--very nice to the ears--and when engine was "prodded" into a real song it spoke loud and clear.
Not too sure as to the neighbors outlook on the sound as I had to climb a steep hill past a number of them in those days to get to my home--but no one came out waving a gun or other weapon--so it must have been an acceptable song.
Muffler options continued
Depending on your budget and objective here a little more to consider:
1) Although 3.0 cs mufflers are scarce or pricey, 2800 is not. I've seen them advertised for $80-100. The catch here is that the inlet and outlet is slightly smaller than a 3.0. ( Approx. 2,1/16" vs. 2,1/4".) So if you're stock, all is well. But, It seems logical that it's basically a welded can and new larger inlets and outlets are just a grind and weld away. Save the flange for the tailpipe and you can just bolt on a new one.
2) Although Flowmaster's 18" is the normal replacement, there are manufacturers other than Flowmasters who make the same muffler for $20 (aluminized steel) vs. $100 (ss). Still need to modify and weld. But heh, that future 3.5 with 2, 1/2 dia. is looking pretty good. If you're really worried about the noise- Flowmaster has longer mufflers in a "hush" series up to 32" with better baffles.
My car has a monza exhaust from many years ago with cast dual tips. ( BSS- before stainless steel) It doesn't have the center muffler and it seems pretty tame to me. No neighbors with shotguns out... and in my area they're everywhere!
Depending on your budget and objective here a little more to consider:
1) Although 3.0 cs mufflers are scarce or pricey, 2800 is not. I've seen them advertised for $80-100. The catch here is that the inlet and outlet is slightly smaller than a 3.0. ( Approx. 2,1/16" vs. 2,1/4".) So if you're stock, all is well. But, It seems logical that it's basically a welded can and new larger inlets and outlets are just a grind and weld away. Save the flange for the tailpipe and you can just bolt on a new one.
2) Although Flowmaster's 18" is the normal replacement, there are manufacturers other than Flowmasters who make the same muffler for $20 (aluminized steel) vs. $100 (ss). Still need to modify and weld. But heh, that future 3.5 with 2, 1/2 dia. is looking pretty good. If you're really worried about the noise- Flowmaster has longer mufflers in a "hush" series up to 32" with better baffles.
My car has a monza exhaust from many years ago with cast dual tips. ( BSS- before stainless steel) It doesn't have the center muffler and it seems pretty tame to me. No neighbors with shotguns out... and in my area they're everywhere!
John Buchtenkirch
Well-Known Member
1)Although 3.0 cs mufflers are scarce or pricey, 2800 is not. I've seen them advertised for $80-100. The catch here is that the inlet and outlet is slightly smaller than a 3.0. ( Approx. 2,1/16" vs. 2,1/4".) So if you're stock, all is well. But, It seems logical that it's basically a welded can and new larger inlets and outlets are just a grind and weld away. Save the flange for the tailpipe and you can just bolt on a new one.
Not really true, in most cases the inlet tubing carries thru in size to the can’s internal plumbing. So a 2800 muffler in theory would flow less but how much difference that makes horsepower wise is anyone’s guess. I will just add that with after market mufflers where the manufacturer’s bottom line is so important I wouldn’t be surprised at all if the 3.0 muffler they sell really is a 2800 muffler (they did tool up for the 2800 muffler first) with larger inlets & outlets :shock:. ~ John Buchtenkirch
Not really true, in most cases the inlet tubing carries thru in size to the can’s internal plumbing. So a 2800 muffler in theory would flow less but how much difference that makes horsepower wise is anyone’s guess. I will just add that with after market mufflers where the manufacturer’s bottom line is so important I wouldn’t be surprised at all if the 3.0 muffler they sell really is a 2800 muffler (they did tool up for the 2800 muffler first) with larger inlets & outlets :shock:. ~ John Buchtenkirch
blumax
(deceased)
Muffler sizes
I can't count the times I have been beneath the BLUMAX and a multitude of 3.0 CS's over the years as we--my mechanic and I were evaluating them for repair, service or whatever needed to put them in sound road condition--and the difference at least externally in not noticable. And today the BLMAX is running a 3.5L with cam through--I believe--a 2800 muffler and connections as noted below without being "choked up".
Me thinks a great deal of speculation is made of the difference between the 2.8L mechanicals being much lesser vs the 3.0L. in US form the 3.0 CS was a lower compression motor of 200 cc's greater displacement--blessed with slightly greater torque, while output and performance of the cars was essentially identical up to about 80 MPH--and only a little beyond.
Further, our friend Hans Herman, our BMW Engineer from the 1960's--and since a renowned design consultant on race and hi-performance engine design--who as a young engineer with BMW was the original design engineer of the cylinder head(s) for our "Big Six". He has shared with me on more than one occasion that the stock exhaust system is a very low restriction type while at the same time providing a nice balance of back pressure that is necessary for best performance. I do believe this world renowned designer and gas flow specialist is well qualified on this matter--so maybe there isn't such a big problem with using a 2800 CS muffler--and fit it with appropriate 60 mm inlet and outlet thus fitting the 3.0 tailpipe extension also of 60 mm at the exhaust tip.
I can't count the times I have been beneath the BLUMAX and a multitude of 3.0 CS's over the years as we--my mechanic and I were evaluating them for repair, service or whatever needed to put them in sound road condition--and the difference at least externally in not noticable. And today the BLMAX is running a 3.5L with cam through--I believe--a 2800 muffler and connections as noted below without being "choked up".
Me thinks a great deal of speculation is made of the difference between the 2.8L mechanicals being much lesser vs the 3.0L. in US form the 3.0 CS was a lower compression motor of 200 cc's greater displacement--blessed with slightly greater torque, while output and performance of the cars was essentially identical up to about 80 MPH--and only a little beyond.
Further, our friend Hans Herman, our BMW Engineer from the 1960's--and since a renowned design consultant on race and hi-performance engine design--who as a young engineer with BMW was the original design engineer of the cylinder head(s) for our "Big Six". He has shared with me on more than one occasion that the stock exhaust system is a very low restriction type while at the same time providing a nice balance of back pressure that is necessary for best performance. I do believe this world renowned designer and gas flow specialist is well qualified on this matter--so maybe there isn't such a big problem with using a 2800 CS muffler--and fit it with appropriate 60 mm inlet and outlet thus fitting the 3.0 tailpipe extension also of 60 mm at the exhaust tip.
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