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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > What Exactly Consists Of The "FBO" Label That So Many Guys Are Throwing Around...



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      07-05-2013, 07:13 PM   #1
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Question What Exactly Consists Of The "FBO" Label That So Many Guys Are Throwing Around...

As the title clearly states, what is considered FBO?

I come across numerous threads, new and old of guys claiming to be full bolt on however, where is the line drawn?

Is FBO in reference to power mods only......one would think that oil coolers, lower charge pipes and upgraded brakes would be part of the equation....Right?

Help me out guys (and ladies) and share your opinion as to what should be, better yet......what IS FBO?



Is it fairly accurate to assume that the average FBO N54 is achieving 375-400 WHP?
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      07-05-2013, 07:16 PM   #2
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Tune, intake, FMIC, downpipes
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      07-05-2013, 07:20 PM   #3
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^Yep. That's what I always considered it to be.

EDIT: There are obviously more bolt ons out there than just that, but those are the big power adders. I wouldn't consider oil coolers, charge pipes, diverting valves, etc. to be needed to be considered 'FBO'.
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      07-05-2013, 07:29 PM   #4
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Hmmm... Would have thought Meth would have been apart of that.... What kind of WHP are you guys seeing with those mods?
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      07-05-2013, 07:32 PM   #5
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From what I've seen, people usually specify FBO+Meth or FBO no meth.

EDIT: FBO, 93 octane, no meth, JB4 G5 ISO, I made 378rwhp and 417rwtq on a dynojet. I have yet to dyno with my meth kit installed, but my butt dyno tells me it will be a good bit more.
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      07-05-2013, 07:44 PM   #6
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Quote:
Originally Posted by Dylan335i View Post
Tune, intake, FMIC, downpipes
/thread
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      07-05-2013, 10:38 PM   #7
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Quote:
Originally Posted by dfjaws View Post
From what I've seen, people usually specify FBO+Meth or FBO no meth.

EDIT: FBO, 93 octane, no meth, JB4 G5 ISO, I made 378rwhp and 417rwtq on a dynojet. I have yet to dyno with my meth kit installed, but my butt dyno tells me it will be a good bit more.
Thanks for clearing it up! I was expecting a huge parts list.... These engines make good power off of basic mods..
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      07-05-2013, 10:42 PM   #8
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Wouldn't exhaust fall into full bolt on...
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      07-05-2013, 10:44 PM   #9
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Quote:
Originally Posted by P Casey View Post
Wouldn't exhaust fall into full bolt on...
Which is exactly why I started this thread....
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      07-05-2013, 10:47 PM   #10
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It is a bolt on item however, not generally included when referencing "FBO" (from my understanding)
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      07-05-2013, 10:47 PM   #11
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Quote:
Originally Posted by Dylan335i View Post
Tune, intake, FMIC, downpipes
I would add exhaust and CP to this? However these 2 don't really add to HP which is why i can maybe understand why its left out.
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      07-05-2013, 10:54 PM   #12
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I never really considered an exhaust in FBO because it adds nothing but sound and weight savings. Power gains are minimal. All the gains are from the downpipes up front. Oddly enough though I do consider a charge pipe to be FBO even though it doesnt add power
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      07-05-2013, 10:58 PM   #13
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Quote:
Originally Posted by psmitty95 View Post
I never really considered an exhaust in FBO because it adds nothing but sound and weight savings. Power gains are minimal. All the gains are from the downpipes up front. Oddly enough though I do consider a charge pipe to be FBO even though it doesnt add power
In my opinion: A charge pipe is to a fmic as a exhaust is to down pipes.. They just round out the mods already in place..
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      07-05-2013, 10:59 PM   #14
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Quote:
Originally Posted by Be Awesome 335i View Post
In my opinion: A charge pipe is to a fmic as a exhaust is to down pipes.. They just round out the mods already in place..
Yea agreed. I guess I consider charge pipe in the FBO category because once you get in the higher power levels your oem one will break eventually like mine did. But with exhaust you really don't need to replace it unless you're pushing crazy power
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      07-05-2013, 11:05 PM   #15
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Saying FBO makes you sound like a tool. Sorry. Couldn't help myself, lol.
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      07-05-2013, 11:07 PM   #16
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Yea, suppose it could go either way....
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      07-05-2013, 11:09 PM   #17
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Quote:
Originally Posted by Wesley Crusher View Post
Saying FBO makes you sound like a tool. Sorry. Couldn't help myself, lol.
LoL thanks for the insight.. Good thing i'm only trying to figure out the definition
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      07-05-2013, 11:13 PM   #18
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FBO = FMIC, Intake, DPs, CP, DVs (or Blow off valve), cat back exhaust.
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      07-06-2013, 04:59 PM   #19
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Quote:
Originally Posted by Be Awesome 335i View Post
Thanks for clearing it up! I was expecting a huge parts list.... These engines make good power off of basic mods..
I have more mods than this, including a charge pipe, diverter valves, oil catch can, wavetrac, HPF clutch, DCI, intake valve cleaning, fresh spark plugs, etc. The mods I listed were just the 'significant' power adders.
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      07-06-2013, 05:11 PM   #20
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Fmic, dps intake and tune, thats FBO
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      07-06-2013, 05:29 PM   #21
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I personally don't consider a cat-back exhaust to be an essential bolt on, because the OEM exhaust flows very well for what it is.
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      07-06-2013, 06:28 PM   #22
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Are we talking about in general or just BMW 335i..... I consider CBE a part of a full bolt on car.
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