|Here are some of the sources for slash 5 mufflers. Some are /6
mufflers that will fit the /5. These are random comments from
riders around the world. I have edited for errors in spelling and
Don't forget that your BMW dealer has
mufflers for about $720 a set, or so I am told.
WORD OF WARNING!!!
If you leave finger prints on your SS header pipes, then
start the bike up, your pipes will turn a really crappy dull gray where
ever you touched them. Make sure they are clean before they get hot. I
just had to have mine cleaned. The guy I took them to couldn't figure it
out, until I told him they were SS. Then he said, "Oh, you must have
touched them and not cleaned them before you installed." Yep... Jim
Overlander, made in
Photo from SteveD, thanks
1. I've heard a lot of complaints about Overlander
stuff. The Overlander R27 header I tried this past year was so off it
interfered with the frame. The header for my Ducati Mark-3 was just as
bad. At least you live in Australia and can return stuff relatively
cheaply. I lost over $100 in postage returning ill fitting parts. I would
not recommend Overlander parts. ---Steve
2. I've had several sets of Overlander mufflers and header pipes
over the years for /7's and have not had any problems with them. I also
bought a complete system for my R60/2 a couple of years ago and am very
happy with it. I did have a problem with the small kink in the headers not
being large enough, so the mufflers would not raise enough to allow the
muffler bolt to fit, but I sent them back, they were bent a little more
and all was well.
Staintune. made in Australia
Photo lifted from their website
1. Nice welding work on the units. A quality item. They clean up pretty easy
with a scouring pad and metal paste. Slightly louder than stock,
looks like the original exhaust. Not sure about the weight difference from
stock. The Staintunes are probably a bit lighter. Always loved them
and its nice to have a permanent exhaust system that won't need
replacement down the line. CAT
2. I had one of their
exhausts on my Oilhead and found it to be a very well made product. It had a little baffle at the end that was removable for a little more
sound. the official ' Just Pete' rating is: Two Thumbs up:)
3. I have Staintune
sports on my mono. I got them brand new for free at work.
There is no way I would pay that much for mufflers. I can and have
done better myself. One of mine rattles. They have got very
unsightly spot weld bumps all over the first cone. FunH
4. I bought the
tailpipes for my Mono, then a year later the collector muffler. The fit
was perfect, quality excellent, and finish literally brilliant. The
products are expensive, but worth it IMO. Headers are next on the agenda. Sound is similar to stock, with a slight throatiness. At the time I got
the pipes for AU$600 (but they were AU$900), the collector was AU$620,
headers are presently $550 including crossover tube. Over here the
comments when anyone sees a bike fitted with them is .....'Ah, Staintunes!!'. Bill.
5. I have 'em on my R100RS. They're a quality product, no doubt. They used to come as either sports or touring setup. The sport was much
louder. I can't remember what mine cost, but it was around OZ$700,
discounted from more than $900. The local club organized it. Steve
6. The Staintune parts I have used are very high quality with
excellent fit and finish. Vince
Epco, made in Germantown, PA
Photo lifted from their website
1. Epco. US
The EPCO mufflers are louder than stock, but not by much. Fit and finish
on the mufflers seems quite good. The EPCO headers can be a little
troublesome to install, but manageable. ---Steve
2. Epco got a bad reputation
for poor fit and it was due to old tooling. It is felt that the new
tooling makes a good product. They are less expensive than Kiehan
that fits better.
3. My Epco mufflers are quieter than my stock mufflers, but
that's not a fair comparison because one of my stock mufflers (the BMW
replacement one) had holes rusted in it. They sounded awful and made the
bike impossible to tune by ear. :-) Ed
4. I have the Epco mufflers on my 75/5. They have a deeper, more
resonate tone than the stock ones. Probably a bit louder but not
excessive. To my eye the smoother finish of the Epcos is more pleasing
than all those seams on the stock mufflers. Native/5
5. I ordered a custom EPCO system for my Green Monster /2
conversion a few years ago. I gave them the type/year of engine and
chassis, told them to build the system using Norton Peashooter shaped
mufflers, and to make the system add some snarl to the sound to fit the
bike's motif. A few weeks later, the box arrived. I fully expected to have
to fiddle with the system to get it to fit properly. Nope. To my absolute
amazement, the system fit with absolute precision with no need for any mods. The system looked fantastic too. I called Tom at Epco to thank him
and commend him on his fine workmanship. I saw Tom at the MOA in Vermont
this summer and thanked him again. Although the system costs a bit
more than a stock chromed steel system, I highly recommend them.
6. I can recommend them. I have them on my R100/R65 hybrid. I
think they sound great; just a bit louder than stock.
7. had Epco make a system to order. very pleased with the
communication. and product. oh ... and it's CONSIDERABLY louder.
8. I have
installed these systems: 1972 R75/5, no crossover, sport mufflers
1975 R75/6, single crossover, sport mufflers 1981 R100 RS, single
crossover, "OEM" style 1990 R100 GS/PD, EPCO exhaust pipes, Staintune
R100R "Y" pipe, D&D muffler
I didn't have the fitment, quality or customer service problems that
PAS had. I think there are too much negative posts based on his
experience. Both the EPCO and Staintune have good thick wall tubing.
9, This is my experience. I hope the info is useful to others.
These exhaust systems are expensive, in my case a bit over $1000 U.S. It
all transpired in the winter, but it took some time to close my credit
card and receive written verification that the account no longer existed.
I was fortunate to have the advice of a senior partner in a top-notch U.S.
There are two parts to this: product quality and customer service. The
company involved is EPCO. I cannot comment on their other products or how
other customers are treated. This is only MY experience and it only
relates to the exhaust system for my 1987 R100RS Monoshock. This
motorcycle is straight, undamaged, and had the original BMW system on it.
PRODUCT: Right header pipe: Port end was slightly oval and too small.
It could not be clamped in the exhaust port with either the old or new
compression/clamp rings. It would just slide out. Left header pipe: When
adjusted as far as possible (hard against the frame) its x-over pipe was
5/16" too low and about 3/4" forward of the left x-over. It was also
pointing slightly down, i.e. not parallel to the other. Right muffler: No
channel for the brake actuating rod (as per OEM). The rod was hard against
the muffler and slightly bent. The flat area for the brake arm was at the
wrong angle (compared to OEM) by about 19 degrees so the muffler would hit
the brake arm under compression (verified with the shock removed). I tried
orienting the muffler every possible way in the undamaged rear mount. Talk
CUSTOMER SERVICE: I haven't mentioned the H-pipe (replaces collector
box) because I never received it, although I had paid for it. The package
I received contained headers, mufflers, x-over clamp and 2 gaskets. NO
H-pipe. I phoned immediately and was told that it was shipped the same
time, same method, but separately because one parcel would be too big, and
I should receive it shortly. Over the next few weeks I made numerous
calls, left recorded messages, and spoke to 2 people who assured me that
it would be checked into and someone would call me. It went on and my
anxiety went up. They never once contacted me. About 7 weeks after the
supposed shipment of the H-pipe I returned everything with a letter
documenting the defects, my displeasure with their service, and demanded a
refund. No refund, no call, no response at all.
Armed with measurements, pictures and all pertinent documents I called
Visa. Their dispute policy allows the merchant 30 days after the return
before they take any action. After 30 days had passed I called them again
and sent them the requested documentation. 3 days later I had a full
credit to my account. Perhaps coincidence, perhaps Visa muscle.
A week or so later I ordered Keihan components from Motobins. They
arrived in less than 2 weeks, and were installed in 2 hours. Perfect fit,
no gaskets, no leaks. The system performs well and looks great. Doug
Supertrapp, made in USA
http://www.supertrapp.com They don't seem to have BMW specific mufflers.
Need a photo
1. The exhaust pipes and mufflers I replaced on my 1990 R100
GS/PD were Supertrapp. The tubing is much thinner and lighter than the EPCO or Staintune. The pipes were not as highly polished as the others and
they didn't heat-color evenly giving them a funny mottled appearance. The thin walled mufflers sounded great but the mounts were welded to the
muffler without re-enforcement and caused the thin wall to crack several
2. In line with Vince's experience, but on a more positive note. The Supertrapp is more of a genuine performance/track item.
Although they have pretty welds, the surface finish makes no attempt to
look as "pretty" as a stock or similar system.
Supertrapps are LIGHT. This results in thinner tubing which may
not be as long-lived on a high mileage machine.
Supertrapps are tuneable. They give you a very wide range of exhaust
tuning which can be very valuable on a track bike, AND it only takes ten -
fifteen minutes to change from track to street-legal. This also
allows you to choose exactly how much extra noise you get on the street,
if any, so you can be as responsible or irresponsible as you like.
Supertrapps have a unique appearance that makes it very easy to spot
one on any vehicle: hotrod, bike, whatever. The stack of discs on the end
that allows you to tune the exhaust (by varying the number of discs) makes
them very distinguishable. They do not look anything at all like a stock
exhaust or any other manufacturer's exhaust. Personally, I find the
appearance very attractive on a cafe bike, but they look a bit too
utilitarian for a stock bike. Kurt
Mac, made in the USA
1. Mac seems to be out of business. Factory made custom
exhaust systems that would fit and work mostly without a need for rejetting. My bike had the MAC Wispertones. I got them used
from IBMWR web site and they lasted 2 years. After I got them the
rear baffle end part failed and no way to repair them. The chrome
was good and they were loud, but not abusive. motorrun
2. Duane, As far as the MAC exhaust system goes, they're
still in business. I keep a set in stock at the shop. I get them from Dixie, a wholesale only distributor. The problem in getting them; and what may make someone believe that they
are out of business, is that they only make one run of BMW mufflers each
year. So when I need them, I call Dixie and check their stock. If I'm having a bad day, they'll tell me that the mufflers are on back
order and won't be in for a few months. So I call MAC and get the
same story. Over all they are a good product, only requiring a
little bit of nudging to fit up to the bike. Chrome is good and they
last a long time. Retail price is also good compared to others out
there. I haven't seen the J. C. Whitney mufflers.
Or maybe I've seen them and didn't recognize them for what they were.
But since I buy wholesale, it doesn't matter. Bruce
3. Don't know how many comments you have on Mac mufflers but I
have a couple sets. The first is on the black '81 R100 I rode to the May
rally. A little louder than stock but not obnoxious. They fit well and
bolted up with no problems. I bought them used and have had them on the
bike for over 1 year and no problems. The second set (also bought used)
are on a 1980 R65. The only complaint I have with these is the fit over
the headpipe is quite loose. I used a tailpipe expander on the ends of the headpipes to stretch 'em
out a bit and that helped.
I have heard some post that they rotted/rusted in a short period of
time but I have not experienced this and so far am happy with them. I
guess the only minus would be that the l/h side muffler has to come off to
pull the rear axle... Regards, Justin B.
4. I bought these for my /5. I have only used them for about
200-300 miles, but I am pleased with the quality and appearance. My
previous BMW mufflers were so rusted out that I cannot reasonably compare
the sound to stock, but I would describe them as "very quiet". I
generally buy all my parts from Hucky's, but I didn't want the Hoske's
(everyone here said they were loud) and I didn't want to pay for SS.
Brian (in Italy)
Sito website USA firm
Motobins in England
Photo of the /6 style lifted from their website
Photo of the /5 style by Phil Hitch, thanks
1. I bought a set of Sito mufflers from Motobins in
the UK and I am very happy with them. The price (by the time I got them to
Canada) was the same as MAC.
2. I had a pair of Sitos a few years back and felt like
they were restrictive, but no technical data to support that seat of the
pants impression. The Sitos are longer than the SWB /5
mufflers according to what I have read and been told. Thanks for
your efforts on the muffler/silencer page. Carl
3. I put a set of Sitos on my RT about 3 years ago. They're attached to my Epco s/s headers. I paid $267 delivered
from Motobins, but I sold my old (stock) mufflers on eBay for $110. Do the math, I think I got a deal. I'm very pleased with the
fit & finish of the Sitos, and they sound & look exactly like the stock
mufflers. I have absolutely nothing negative to say about
4. I purchased a set of the /6 style Sito's from Motobins in
Spring, 2006. Although they offer the 'cigar-end' mufflers as well,
I went with the /6 style, which I like. This style is also cheaper.
Both sets are overly long for the /5 swb, compared to the factory Zuena's.
The cut out area for the rear axle and brake pedal arm are extra long to
accommodate either wheelbase. I don't recall exactly what I paid (
and the price has gone up a bit, since then), but even with approximately
$50. shipping to Pa., the total cost easily beat about any other US
supplier ( with the exception of the EMGO / JC whitney model).
Postal time was about a week . The construction is non-stainless
steel with a high quality chrome finish. They have exposed welds,
like the original style. The are considerably heavier than the
factory originals. No problem with fit. Mounting brackets come
attached. The sound is a bit louder than stock, most noticeably at
idle with a pop-pop-pop sound. I kind of like the extra length, but
someone else may not agree. I am using Mikuni VM32's, which were
running slightly rich throughout the range. After installing the Sito's it brought the carbs' middle to upper range into perfection.
I had to richen up the idle a tad. I may have to mess with the main
jetting a bit as it seems to bog a bit on WOT. I only mention this,
because someone may find a slight change needed to carb set up. I
thought I noticed a slight performance gain. There is a tasteful
marking of " Sito" near the ends, which is only noticeable if you are
quite close. FWIW, they come with certificates for approved use for
several European countries.
5, I've had the Sito mufflers on my /5 since the spring of 2002.
I'm still very happy with them. The chrome is still in great shape, and
they are structurally as good as new. As a matter of fact, I was just
cleaning the "winter grime" off my bike last weekend and thougth to myself
how good the mufflers are still looking. Phil
6. I put Sitos on my bike a couple years ago. So far, so good.
I'm pleased with 'em. Scot
Keihan, made in the UK
http://www.keihan.co.uk/ They make mufflers for many
The Keihan /5 muffler (silencer)
Photo lifted from their website
1. FYI You probably know this but Keihan makes the cigar
end /5 mufflers as well. These are stainless steel so they
don't have the smooth shiny chrome appearance a stock BMW set would have. I just got a set from Hucky's. Expensive at ~ $550 to the door. Cheaper than stock ones though. The mounting brackets are
extra at $30 a pair! Those are included in the $550 as well is
shipping. They look like the originals and are shorter than
the Sitos. Carl
2. I have to disagree with Josh. I have Keihan
systems fitted to three airheads. The fit is perfect, the finish is good
and (unless you manage to get a set of specials) the note and tuning is as
stock. The only slight criticism I have is that the rear of the 'Mono'
silencers isn't quite the same shape... but that really is nit picking! On
the plus side, the header to balance pipe clamps are substantial Stainless
items, not like the bodged on lugs on the stock headers
Yes, they discolour... all stainless steel pipes do but the old set I
have for spare still cleans up like new with Sovol... I really think they
are as good as any on the market and considerable better than stock. Rob
3. Total crap. Got mine from Motobins. Don't buy them.
I can't wait for mine to wear out and warrant replacing. I bought a seat of Stainless Keihan header pipes and mufflers from
Motobins a few years ago. I put them on my fully restored 77 R100s. How
can I put this nicely...?.... Total crap! Waste of money. Mine
don't clean up. period. honestly, I think I got a bum set. Josh
JC Whitney, made in the USA?? See below. They have a
BMW looking muffler
that will bolt on and is very cheap.
Photo by Valkernaut, thanks
1. The JC Whitney I've seen are a copy of the /6 and /7 type.
In fact they are closer to the 40mm Exhaust. They send it with a
adapter to make it 38mm and look and sound almost like a stock BMW.
2. I've had a set of JCW mufflers on my / 7 the past four to five
years. When I first put them on, they sounded a bit more throatyier than
stock. Chrome still holding up alright, but is showing a bit of surface
rust at welded spots. Looks like they should last several more years. I'd
buy them again. Randy
3. The left one is made with a 4" dimple for removing the axle on
both the SWB and LWB models. They are made by EMGO Asia. I
have these Emgo mufflers. The fit is pretty good. I got all the mounting
holes to line up without issue. The biggest difficulty is getting
the spacer and muffler around the header tubes - what I ended up doing, is
sliding the spacer 1/2 way out of the muffler and spreading it around the
header pipe, and used a rubber mallet on the end of the muffler to push
everything together. Assorted comments from
JIM CRAY. UK designed
Unit 9 Eaves Court
Eurolink Industrial Estate
Kent ME10 3RY
Tel/Fax: 01795 431444
1. Performance pipe , made by Keihan. Recommended by
Charles Newall. About $40 more expensive than Keihan's
2. I picked up a set for an R100 project I'm working on. (Had
to have a friend in England get them for me because I couldn't seem to get
Jim motivated to send me a set here in the States.) Don't know if
Jim makes them or has Kiehan make them for him, but they are beautiful!
They look like stock but are stainless. Made for 40mm headers, but
come with reducers for 38mm headers. The muffler baffle is a larger
diameter than stock and is straight through. He claims a substantial
performance gain with proper jetting, but I can't confirm as I haven't put
them on anything yet. With the current exchange rate, they were
EXPENSIVE. Chuck S.
3. Jim Cray is a long time Boxer tuner who works out of Kent
in the UK. He is one of the few that I would trust (from
reputation) with things Boxer. He commissioned the silencers
from Keihan. They are outwardly nearly identical to the
standard Keihan stainless silencers but have different baffles to improve
gas flow. The only visible difference is that the hole in the end is
As far as I know they are only available through Jim Cray. Although Jim is the dogs danglies when it comes to Boxers, he is a bit of
a Luddite when it comes to other things so he has no website and does not
do Email. contact has to be by snailmail, landline or in person.
(It says something for his reputation that he is still able to operate
this way...) Rob
4. Jim Cray had always being talking about getting some
sets of 'sports silencers' made up ever since he did the first stage
tuning work on my bike. A couple of years later I decided to
do for the replica r90s route to include 40mm pipes, Dellortos and some
sports silencers. I asked Jim about 'progress' on the
silencers. He said that he was looking for some certain orders
to make it worthwhile to get some sets designed and made up by Keihans. I put the word out via the Motobins
forum, Jim got some orders and the silencers were made.
They look almost stock, sound like a british twin on goldstar type
silencers, and are a straight through design. The silencer is
stainless and looks new 3 years on.
You can see a before and after dyno chart based on a twin plugged
r100/7 and a photo of the silencer outlet here on my photobucket account. They're also pictures of the various parts involved in the changes to my
engine and a before and after dyno chart of the Jim Cray stage 1 tune,
which consists of gas flow, twin plug, K&N filter and changes to the
airbox. Take a look at the torque curve.
5. Located in the Industrial wastelands of Sittingbourne lies
hidden a genius of engineering by the name of Jim Cray. I stress the
emphasis on engineering, Jim won't thank me for adding to his workload
with routine servicing, especially as he is back to just himself full-time
and a P/T technician/apprentice. Jim's workshop is generally full of
rebuilds, renovations and his preferred favourite pastime road & race
performance tuning jobs. If you want your airhead to fulfill more of its
potential, then Jim's the man. My PD had his Stage 1 Engine Tuning
Package done by Jim and he has also in my period of ownership rebuilt the
gearbox, rebuilt the front suspension in addition to routine servicing.
His knowledge is vast, and all his work is repeat business, word of mouth. A good supporter of the club he opened the doors of his workshop to us and
is always willing to offer his advice and knowledge. Rob
Note from Duane. My guess is that if you
want the best, are willing to pay and wait, then Jim is your man.
Slowly get to know him and live within his preferences. If he
requests, I will remove these comments about his products.
http://www.armoursltd.co.uk/ I requested information and got this.
Hello, We do manufacture stainless steel exhaust systems for most pre 1985
BMW motorcycles, please send details for a quotation.
They also make many BMW motorcycle tools. These mufflers are the
closest thing you will ever find to a real Hoske pipe. They come in
38mm and 40mm sizes and have a removable baffle. They are an exact
replica of a Hoske, as I have a real Hoske to match it up against.
They are EXPENSIVE (~450 Euros) and they will NOT sell to the US, so if
you want a set, you have to know someone in Europe who will buy them and
ship them to you. But they are WORTH IT! Phil
Hucky's Spare Parts is reported to have Hoske mufflers and Stainless Steel mufflers for
the /5 with the original looking seams and welds.
1. I have Hoske repros from Hucky on my /6. Not nearly as loud
as yer average obnoxious cruiser pipes, but a good deal louder than stock.
Any louder and I'd feel guilty and antisocial. They do sound nice, but the
next exhaust I buy will be SS and not louder than stock. Finish is
pretty good; no corrosion after 2+ years, only heat discoloration.
Your comments wanted
I just replaced the Epco silencers on my '70 R75/5 with a set of Keihan
silencers. After comparing my restored '70 R75/5 with my original '72
R75/5, I was somewhat annoyed to discover that the Epco silencers are a
little longer than stock, such that they stuck out past the rear wheel on
a SWB bike. Some comparisons. . . .
The Keihan silencers look almost identical to OEM silencers. The Epco
silencers don't have quite the same shape as originals, and lack seams.
That being said, the Epco silencers look a little more streamlined and
might appeal to those who aren't sticklers for original looks.
The Epco silencers sit a little outboard on each side and up compared
to the Keihan silencers.
Fit and finish on both products is very good.
At current exchange rates, the made in the UK Keihan silencers are a
bit more expensive than the made in the U.S. Epco silencers.
My Epcos are going to a fellow with a '73 LWB R75/5. I think the
slightly longer length doesn't stand out as much on the LWB bikes.
BMW mufflers for the /2