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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 > FINALLY getting my JB4!



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      02-14-2013, 06:59 PM   #1
'11 335i
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FINALLY getting my JB4!

On monday i will finally have the time to go get my parts from terry, a JB4, downpipe, 15mm spacers and an intake. Cant wait to have it installed and take it out for a run
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      02-14-2013, 07:08 PM   #2
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      02-14-2013, 07:08 PM   #3
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Drive safe. I don't want to see a thread about how the JB4 caused some mishap.
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      02-14-2013, 07:38 PM   #4
'11 335i
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Quote:
Originally Posted by HoustonBMWClub View Post
Drive safe. I don't want to see a thread about how the JB4 caused some mishap.
Always, I'm not one of those rice rocket scene kids that try to race everything that moves lol
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      02-14-2013, 08:42 PM   #5
AWil335i
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Originally Posted by '11 335i View Post
Always, I'm not one of those rice rocket scene kids that try to race everything that moves lol
Yet
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      02-14-2013, 09:22 PM   #6
ef11
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Does JB4 add more performance than the COBB tuner, or are they about the same?

I have JB4 (never installed) but I'm about to buy the extended warranty for my car and I've heard the COBB is much easier to remove and is undetectable once you remove it, where the JB4 takes a while to remove and the dealer can still tell.

Can anyone clarify this? Not trying to hijack but I figured since you just bought JB4 maybe you've done some good research on this.
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      02-14-2013, 10:23 PM   #7
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Quote:
Originally Posted by ericfox11 View Post
Does JB4 add more performance than the COBB tuner, or are they about the same?

I have JB4 (never installed) but I'm about to buy the extended warranty for my car and I've heard the COBB is much easier to remove and is undetectable once you remove it, where the JB4 takes a while to remove and the dealer can still tell.

Can anyone clarify this? Not trying to hijack but I figured since you just bought JB4 maybe you've done some good research on this.
JB4 is best bang for the buck, ive also heard its pretty easy to install and uninstall, never heard of it being noticeable still after its removed. Im not sure, dont have one yet. but read a lot about it.
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      02-15-2013, 12:30 AM   #8
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Quote:
Originally Posted by ericfox11 View Post
Does JB4 add more performance than the COBB tuner, or are they about the same?

I have JB4 (never installed) but I'm about to buy the extended warranty for my car and I've heard the COBB is much easier to remove and is undetectable once you remove it, where the JB4 takes a while to remove and the dealer can still tell.

Can anyone clarify this? Not trying to hijack but I figured since you just bought JB4 maybe you've done some good research on this.
At the end of the day, all the options (cobb, jb4, giac, vishnu) give about the same power with the same mods.

It would be pretty hard to tell you had a jb4 installed once removed. Though it could be questioned if a tech started looking for missing paint on the bolts and such. But even then, would be hard to prove the a jb4 install/uninstall was the cause of said scratched bolt paint.

I've read on the forums that if bmw really wanted to, the could tell (by reading the dme) if the car had hit boost levels above stock levels. Guess that would be a dead give away (and tune independent). Not sure if this is true or not though.

JB4 is definite bang for the buck champion. That said, i am thinking of getting rid of mine and going with Cobb. I just like the idea of a flash tune, better than a piggy back. Of course now bms has the g5 board and supporting flash tune (using a cobb unit).
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      02-15-2013, 03:04 AM   #9
WNF_335i
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your in for a blast
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      02-16-2013, 10:01 AM   #10
Mike@N54Tuning.com
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Quote:
Originally Posted by ericfox11 View Post
Does JB4 add more performance than the COBB tuner, or are they about the same?

I have JB4 (never installed) but I'm about to buy the extended warranty for my car and I've heard the COBB is much easier to remove and is undetectable once you remove it, where the JB4 takes a while to remove and the dealer can still tell.

Can anyone clarify this? Not trying to hijack but I figured since you just bought JB4 maybe you've done some good research on this.
Both COBB and JB4 remove all traces once removed. I think that the JB4, especially the JB4 G5 ISO is more powerful then COBB. With COBB you can get a custom map done which then puts it more on par with the maps in the JB4, but the JB4 can also be custom tuned, so they are pretty similar.

Both are great tunes.

If you already have the JB4 I would just upgrade to the G5 ISO board if you don't already have it and stick with that.

Mike
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      02-16-2013, 02:23 PM   #11
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JB4 is the best thing that ever happened to my 335xi...
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