Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 02-14-2013, 08:12 PM
agoliver2 agoliver2 is offline
Registered User
Location: New York
 
Join Date: Apr 2011
Posts: 89
Mein Auto: 1998 BMW 323i
Question Is dual exhaust possible on 1998 323ic?

HI i recently put a new exhaust on my bmw and i just wanted to know if anyone knew if there was a way that i could duplicate this on the other side. Ive seen some e36s on youtube do it but i looked underneath the car myself and found little room due to the gas tank. But people seem to somehow make it work I just wanted to know if anyones done this before i go buy myself another exhaust online! i have a dual ram air setup headers and exhaust so i was looking to make a dual exhaust. Any ideas or suggestions i would greatly appreciate thanks
Reply With Quote
Ads by Google
  #2  
Old 02-14-2013, 08:36 PM
ReillyM3's Avatar
ReillyM3 ReillyM3 is offline
Officially Welcomed to the 'Fest
Location: Philadelphia PA
 
Join Date: Aug 2012
Posts: 210
Mein Auto: 1994 325i sedan
In my opinion the rewards are greatly outnumbered by the drawbacks and needed effort. However, its not my car and "different strokes". To do a dual exit you will need to (just by looking under my car) cut into your spare well, alter or switch rear bumper, have a shop mandrel bend and weld the piping, fabricate hangers and drill holes. I havent done it on an e36 but have on my old porsche... You would be better off doing cams as far as performance but once again its your canvas so paint as you must.
__________________

1994 325i (current)
2006 325i (current)
1995 525i
1990 325i
1988 Jetta 8v
1987 Gti 16v

1985 Jaguar Xj6
1984 Jaguar Xj6
1966 Mustang
1965 Falcon Wagon
1961 Buick Special
1962 Buick Special Wagon
1955 Pontiac Cheiftan
1961 Falcon Tudor
1962 Faclon Ranchero
Reply With Quote
  #3  
Old 02-14-2013, 09:04 PM
ZeGerman's Avatar
ZeGerman ZeGerman is offline
Warm Leatherette
Location: Seattle, WA
 
Join Date: Mar 2009
Posts: 18,442
Mein Auto: 1998 BMW 328is
The 328 and M3 have totally dual exhaust until it meets way back at the muffler. Unfortunately, the 323 bottlenecks the exhaust ahead of the catalytic converter and then runs a single pipe all the way back to the muffler. There are actually significant power gains to be had with a 323 if you upgrade to the 328 or M3 midpipe with a 328 or M3 cat-back. That's the route I would recommend for this application. As far as having separate dual mufflers, etc., I wouldn't do that. There really isn't room to do it easily due to the spare tire well and it looks silly almost all of the time when people try to do it. Almost universally looks ghetto rigged.
__________________

1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback
Reply With Quote
  #4  
Old 02-15-2013, 07:48 AM
Hectorml07's Avatar
Hectorml07 Hectorml07 is offline
WYKDBMR
Location: California
 
Join Date: May 2009
Posts: 675
Mein Auto: BMW E39 6 Speed
Dual exhaust belongs in cars that come equipped with it already such as the M5, OR E90 M3. Just by looking at them you can tell deserve dual exhaust! I have seen some e36s with dual exhaust though, just not my cup of tea. It makes me giggle lol. It reminds me of guys that I have seen in their tricked civics with large dual exhaust systems in a little 1.8 four banger sounding terrible to me, but I guess it sounds powerful to them.

All in all its up to you and what you do to your car since you are the owner.
__________________
Reply With Quote
  #5  
Old 02-15-2013, 07:58 AM
B1MM3R's Avatar
B1MM3R B1MM3R is offline
Jesse Moon Bayne
Location: Roanoke, VA
 
Join Date: Apr 2010
Posts: 7,240
Mein Auto: e30, e36, e70
Karl nailed it about the 323 exhaust. If you decide to go the route he stated, I have a 328 catback in great shape for $50 if you want it. And also a straight pipe midsection.
__________________
Jesse
"Cassie"///Mpowered 93 318is 5speed (95 m3 swap).Vaders..Bavauto short shifter..dinan cat back..sways..3.23lsd..tms chip..staggered dsII's...BCracing coilovers..F&R strut tower bar...M3 brakes..x-brace..AFE CAI
2007 X5 3.0si (Wifes)
E30 87 325e DD
Reply With Quote
  #6  
Old 02-15-2013, 10:15 AM
granlund granlund is offline
Officially Welcomed to the 'Fest
Location: Dayton, OH
 
Join Date: Jan 2011
Posts: 545
Mein Auto: -02 530 & -92 325is
Since the 323 only has one O2 sensor, wouldn't an OBD1 325/M3 midpipe be a better choice?
http://www.realoem.com/bmw/showparts...09&hg=32&fg=30
http://www.realoem.com/bmw/showparts...77&hg=18&fg=10
Reply With Quote
  #7  
Old 02-15-2013, 10:20 AM
B1MM3R's Avatar
B1MM3R B1MM3R is offline
Jesse Moon Bayne
Location: Roanoke, VA
 
Join Date: Apr 2010
Posts: 7,240
Mein Auto: e30, e36, e70
the straight mid pipe I have is obd1 that comes with the 328i catback.
__________________
Jesse
"Cassie"///Mpowered 93 318is 5speed (95 m3 swap).Vaders..Bavauto short shifter..dinan cat back..sways..3.23lsd..tms chip..staggered dsII's...BCracing coilovers..F&R strut tower bar...M3 brakes..x-brace..AFE CAI
2007 X5 3.0si (Wifes)
E30 87 325e DD
Reply With Quote
  #8  
Old 02-15-2013, 11:01 AM
HakenTT's Avatar
HakenTT HakenTT is offline
Officially Welcomed to the 'Fest
Location: Arizona
 
Join Date: Aug 2011
Posts: 231
Mein Auto: '91 E30
323ic single exhaust is not restrictive for 2.5L engine. It goes down to 2 1/4 inch in front of the converter, after the converter it goes to 2.5 inch wide pipe. 190 horsepower has no problem with 2 inch exhaust pipe.

328i and M3 mid section is worse. Right after converters the two small resonators, the pipe is only 1.5 inch wide inside on each side
Reply With Quote
  #9  
Old 02-15-2013, 12:01 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 13,760
Mein Auto: 1995 318is / 1993 325is
I'll be damned. He's right (if his pipe size figures are right).

323 exhaust before cat= 3.976 sq. in. cross section
323 exhaust after cat= 4.908 sq. in. cross section
M3/328 exhaust after cat each= 1.767 x 2= 3.534 sq.in. cross section total of two pipes.
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #10  
Old 02-15-2013, 12:19 PM
ZeGerman's Avatar
ZeGerman ZeGerman is offline
Warm Leatherette
Location: Seattle, WA
 
Join Date: Mar 2009
Posts: 18,442
Mein Auto: 1998 BMW 328is
There has to be more to it than that. There is no way BMW would use a more restrictive exhaust on the 328 and M3 than on the 323. Virtually everyone (except Hawken) has said that the 328 and M3 exhausts flow much better than the 323 exhaust. Perhaps overall diameter isn't the whole story, and that by having a larger overall diameter in the 323 exhaust, scavenging and velocity is hampered, thereby reducing power. Everyone says that a 328 or M3 exhaust on a 323 is the single best performance modification in terms of gaining power.

If the 323 exhaust was superior, we'd all be putting 323 exhausts on our cars... Besides, if the 323 exhaust is 2.5 from the cat back, and the 328 has two 1.5" pipes, that's a half-inch more total from the cat back compared to the 323. Am I having problems with my maths? The 323 most definitely does not have a nearly 5" single pipe from the cat to the muffler.
__________________

1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback

Last edited by ZeGerman; 02-15-2013 at 12:30 PM.
Reply With Quote
  #11  
Old 02-15-2013, 03:49 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 13,760
Mein Auto: 1995 318is / 1993 325is
You figure it up. 2.25"/2 (radius)= 1.125" X 1.125" (squared)= 1.265265 X 3.1416 (pi)= 3.976 sq. in area cross section

2.5"/2 (radius)= 1.25" X 1.25" (squared)=1.5625 X 3.1416 (pi)= 4.90875 sq. in. cross section. (NOT diameter).

1.5/2 (radius)= 0.75" X 0.75" (squared)= 0.5625" X 3.1416 (pi) = 1.76715 sq. in. cross section X 2 (two pipes)= 3.5343 sq. in. cross section total.

I really wonder if that 1.5" twin pipe figure is correct.....
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #12  
Old 02-15-2013, 04:12 PM
southpark11235's Avatar
southpark11235 southpark11235 is offline
bimmerfest Supporting Member
Location: Saugerties NY
 
Join Date: Jan 2012
Posts: 2,575
Mein Auto: 1999 BMW 323is
While HakenTT seems to be right about the size of the 323 pipe, the 328 pipe is half an inch bigger than he suggest.
Attached Thumbnails
Click image for larger version

Name:	IMG_0371[1].jpg
Views:	43
Size:	94.3 KB
ID:	362446   Click image for larger version

Name:	IMG_0372[1].jpg
Views:	44
Size:	104.8 KB
ID:	362447   Click image for larger version

Name:	IMG_0373[1].jpg
Views:	42
Size:	113.4 KB
ID:	362448   Click image for larger version

Name:	IMG_0374[1].jpg
Views:	38
Size:	126.2 KB
ID:	362449   Click image for larger version

Name:	IMG_0375[1].jpg
Views:	44
Size:	111.0 KB
ID:	362450  

__________________
Alex//1999 323is - power e46 M3 seats, style 43 rims, 328 exhaust, Z3 rack, Bilstein PSS coilovers

“We got about ten minutes before this entire county is up in flames. If you want to live, you’d better step on the gas! Oh wait is this a Tesla? Sh!t! Well, step on the prissy peddle, we're going to die!” – Cartman
Reply With Quote
  #13  
Old 02-15-2013, 04:17 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 13,760
Mein Auto: 1995 318is / 1993 325is
The real question is what size are the twin pipes coming out of the cats? Or is that one of them? That makes a HUGE difference. That would make the outlet cross section 6.283 sq. in. total , not 3.543
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?


Last edited by hornhospital; 02-15-2013 at 04:22 PM.
Reply With Quote
  #14  
Old 02-15-2013, 04:25 PM
southpark11235's Avatar
southpark11235 southpark11235 is offline
bimmerfest Supporting Member
Location: Saugerties NY
 
Join Date: Jan 2012
Posts: 2,575
Mein Auto: 1999 BMW 323is
The second picture is the 328 pipe after the cat with no bulge.
__________________
Alex//1999 323is - power e46 M3 seats, style 43 rims, 328 exhaust, Z3 rack, Bilstein PSS coilovers

“We got about ten minutes before this entire county is up in flames. If you want to live, you’d better step on the gas! Oh wait is this a Tesla? Sh!t! Well, step on the prissy peddle, we're going to die!” – Cartman
Reply With Quote
  #15  
Old 02-15-2013, 04:27 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 13,760
Mein Auto: 1995 318is / 1993 325is
Then the cross section (and flow rate) are WAY higher on a 328 exhaust pipe set. Thanks!
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #16  
Old 02-15-2013, 04:31 PM
ZeGerman's Avatar
ZeGerman ZeGerman is offline
Warm Leatherette
Location: Seattle, WA
 
Join Date: Mar 2009
Posts: 18,442
Mein Auto: 1998 BMW 328is
Yeah, it doesn't make sense. Everybody reports power gains with the 328/M3 mid-pipes and cat backs over the 323 units. Haken is literally the only person I've ever heard say that the 323 exhaust is better. His claim doesn't add up, nor should it. BMW would never put a more restrictive exhaust on their higher performing models.

Also, how is cross section different than area? I'm assuming that the terms are not synonyms, but when I calculated the are using Pi*radius squared, it produced the same numbers as your cross section figures. Sorry for being dense...

EDIT: That makes much more sense! Haken said the 328 pipes were 1.5" each, but those photos are showing that they're much bigger than that. I think he was suggesting that they're double-walled, and that the inner pipe is only 1.5" in diameter, but that's not what we're seeing in the photos.
__________________

1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback

Last edited by ZeGerman; 02-15-2013 at 04:42 PM.
Reply With Quote
  #17  
Old 02-15-2013, 04:45 PM
agoliver2 agoliver2 is offline
Registered User
Location: New York
 
Join Date: Apr 2011
Posts: 89
Mein Auto: 1998 BMW 323i
hey guys. I would like to thank you guys for the responses as the threads got many. I guess a dual exhaust setup is really not worth it for the mods that need to be made. I was looking and just don't seem to see the clearance for the full exhaust. My 323i is restricted like crazy. they restricted my whole exhaust system my headers my air box my computer my intake manifold & im sure other crap as well. I've changed my headers and they actually close off the outlet with a little indentation in the headers themselves to restrict air flow. I've changed my headers exhaust and made a dual ram air setup & it does 0-60 in around 5.6 which is the best time I've got so . (and it is an automatic)As for the 328-m3 exhaust swap im not really sure if I can put dual pipes all the way from the headers back to my exhaust. I just have a single cat & no resonator. I don't think it will fit but I guess you don't know until you try. I don't understand why they also detuned my car from the factory. The 325 has the same motor & I believe less restrictive. I believe the 328-m3 exhaust will be much better even though form this thread you guys say its smaller. I just don't know how 2 cats are going to fit under my car. But I could be wrong I don't know if anyone's ever done this before? or even m50 intake manifold swap for more power? and my car is a OBD2 not OBD1 to whoever stated above. thanks

Last edited by agoliver2; 02-15-2013 at 04:47 PM.
Reply With Quote
  #18  
Old 02-15-2013, 05:02 PM
ZeGerman's Avatar
ZeGerman ZeGerman is offline
Warm Leatherette
Location: Seattle, WA
 
Join Date: Mar 2009
Posts: 18,442
Mein Auto: 1998 BMW 328is
Uh oh....
__________________

1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback
Reply With Quote
  #19  
Old 02-15-2013, 05:10 PM
ZeGerman's Avatar
ZeGerman ZeGerman is offline
Warm Leatherette
Location: Seattle, WA
 
Join Date: Mar 2009
Posts: 18,442
Mein Auto: 1998 BMW 328is
Quote:
Originally Posted by agoliver2 View Post
My 323i is restricted like crazy. they restricted my whole exhaust system my headers my air box my computer my intake manifold & im sure other crap as well.
Oh grasshoppa, you have much to learn. The headers, air box, and intake manifold on your 323 are the same units as found on the M3 and are not restrictive.

Quote:
Originally Posted by agoliver2 View Post
I've changed my headers and they actually close off the outlet with a little indentation in the headers themselves to restrict air flow.


Quote:
Originally Posted by agoliver2 View Post
I've changed my headers exhaust and made a dual ram air setup & it does 0-60 in around 5.6 which is the best time I've got so . (and it is an automatic)
Tell me more... You must have bought yourself a magic E36 323 auto which is somehow as fast as a 240hp M3! Don't ever sell it!

Quote:
Originally Posted by agoliver2 View Post
As for the 328-m3 exhaust swap im not really sure if I can put dual pipes all the way from the headers back to my exhaust. I just have a single cat & no resonator. I don't think it will fit but I guess you don't know until you try.
Remember all that talk about mid-pipes above???

Quote:
Originally Posted by agoliver2 View Post
I believe the 328-m3 exhaust will be much better even though form this thread you guys say its smaller.
Time to re-read this thread.

Quote:
Originally Posted by agoliver2 View Post
I just don't know how 2 cats are going to fit under my car
I have no idea, either.

Quote:
Originally Posted by agoliver2 View Post
But I could be wrong I don't know if anyone's ever done this before?
Nope, this has never been done. You will be the first.
__________________

1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback

Last edited by ZeGerman; 02-15-2013 at 05:13 PM.
Reply With Quote
  #20  
Old 02-15-2013, 05:26 PM
agoliver2 agoliver2 is offline
Registered User
Location: New York
 
Join Date: Apr 2011
Posts: 89
Mein Auto: 1998 BMW 323i
well i have read the thread and i have the 0-60 video to back me up! ITs true it does that to 60 if i can find a way to post the video i will, Regardless from the research that i havre done on my car over the years, ive found all this infomation about it being so restrictive. if you would read online, you will see that it is. I have taken my car apart myself and they must obviouslt be restrictive because once ive changes all the parts off my car it went alot faster. If you do some reseach on the 323i you will see that it is . you were saying that the seperate pipes on the 328 were 1.5 incehes each as well so techenecally smaller than a single pipe on my 323i & i meant having dual pipes back to my exhaust in which you would need to have a cat.

Last edited by agoliver2; 02-15-2013 at 05:34 PM.
Reply With Quote
  #21  
Old 02-15-2013, 06:42 PM
Poorboysracing's Avatar
Poorboysracing Poorboysracing is offline
Fast Cars Suck!
Location: Albany, NY
 
Join Date: May 2009
Posts: 7,591
Send a message via AIM to Poorboysracing
Mein Auto: '13 FIAT 500 '68 BMW 1602
did you happen to put a different set of wheels/tires on your car from stock?
__________________

*The I Drove to Both East and West Coast Bimmerfest Club* Member #1
@PoorBoysRacing on twitter & instagram
Reply With Quote
  #22  
Old 02-15-2013, 06:58 PM
jonesin's Avatar
jonesin jonesin is offline
The Canadian Prick.
Location: Fort McMurray AB
 
Join Date: Dec 2008
Posts: 12,521
Mein Auto: '96 328is Cosmos
Quote:
Originally Posted by agoliver2 View Post
well i have read the thread and i have the 0-60 video to back me up! ITs true it does that to 60 if i can find a way to post the video i will, Regardless from the research that i havre done on my car over the years, ive found all this infomation about it being so restrictive. if you would read online, you will see that it is. I have taken my car apart myself and they must obviouslt be restrictive because once ive changes all the parts off my car it went alot faster. If you do some reseach on the 323i you will see that it is . you were saying that the seperate pipes on the 328 were 1.5 incehes each as well so techenecally smaller than a single pipe on my 323i & i meant having dual pipes back to my exhaust in which you would need to have a cat.
One person said that, then several other people corrected him. Including one guy who posted pictures showing that the first guy was wrong.


Reading retention fail.
__________________
Quote:
Originally Posted by hnaz View Post
I grew up in a time when the internet was just a baby. Grammar back then versus now... holy cow. You could watch the degradation of society as the internet became more mature.

HAS KEN HAD HIS MEDS YET?
Reply With Quote
  #23  
Old 02-15-2013, 07:02 PM
agoliver2 agoliver2 is offline
Registered User
Location: New York
 
Join Date: Apr 2011
Posts: 89
Mein Auto: 1998 BMW 323i
no they are stock rims with bridgestone potenza tires. ?
Reply With Quote
  #24  
Old 02-15-2013, 07:09 PM
jonesin's Avatar
jonesin jonesin is offline
The Canadian Prick.
Location: Fort McMurray AB
 
Join Date: Dec 2008
Posts: 12,521
Mein Auto: '96 328is Cosmos
Joe asked so that you'd have the benefit of doubt. With larger circumference tires your speedometer would show a faster speed than you're actually travelling because it would show the speed based on the rotation of smaller circumference stock wheels, which is what your speedometer is calibrated for.

Make sense?
__________________
Quote:
Originally Posted by hnaz View Post
I grew up in a time when the internet was just a baby. Grammar back then versus now... holy cow. You could watch the degradation of society as the internet became more mature.

HAS KEN HAD HIS MEDS YET?
Reply With Quote
  #25  
Old 02-15-2013, 07:12 PM
agoliver2 agoliver2 is offline
Registered User
Location: New York
 
Join Date: Apr 2011
Posts: 89
Mein Auto: 1998 BMW 323i
yes that would make sense but they are stock i dont understand the doubtfulness of my car i will find a way to put on the video if i can figure out how. stock rims just headers dual ram air custom setup and exhaust. pretty quick i believe for a 2.5. thats why i wanted a dual exhaust but it seems not to be possible with the clearance
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 01:25 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms