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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 > JB4 for N54 or N55?



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      02-08-2014, 05:57 PM   #1
SacTownN54
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JB4 for N54 or N55?

Hey everyone, I need some help identifying a JB4 I just purchased. I received it in the mail today and after opening the package, I was a little surprised to see that the one I got looks different than every other n54 JB4 G5 ISO unit I've seen on here and elsewhere. As you can tell from the pictures, the unit is completely square instead of the tapered shape I am used to seeing with the n54 JB4. Before I install this into my 2010 N54, can someone please verify that I have the right one? It looks to me like this is the JB4 for the N55, but the seller has assured me that the unit came off his n54. I've been really excited to get this thing installed, but I want to make sure I have the right one before doing so. Any help would be greatly appreciated!!
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      02-08-2014, 06:01 PM   #2
tc535i
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my n54 was square... not sure what we're looking at here?

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      02-08-2014, 06:26 PM   #3
igotag
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That is just the new heat resistant box designed for the ISO board.
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      02-08-2014, 06:30 PM   #4
SacTownN54
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Thanks! I'm a new BMW owner and even newer JB4 owner so please excuse my noobness.
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      02-08-2014, 07:56 PM   #5
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That is the N54. You also have the N54 harness.

The harness on N55 is completely different.
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      02-08-2014, 08:54 PM   #6
SacTownN54
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Quote:
Originally Posted by Jeff@TopGearSolutions View Post
That is the N54. You also have the N54 harness.

The harness on N55 is completely different.
Thanks Jeff! I just wanted to make sure before I went through the effort of hooking it up to the car.
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      02-08-2014, 09:05 PM   #7
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Thanks Jeff! I just wanted to make sure before I went through the effort of hooking it up to the car.
Oh and make sure your dog doesn't eat it cause he/she looks like it's about too
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      02-08-2014, 09:18 PM   #8
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Oh and make sure your dog doesn't eat it cause he/she looks like it's about too
that'd be mine, and he was just a bit curious

prefers meatier bits over metal, but he'll take what he can get for sure
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      02-09-2014, 11:33 AM   #9
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Quote:
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Oh and make sure your dog doesn't eat it cause he/she looks like it's about too
that'd be mine, and he was just a bit curious

prefers meatier bits over metal, but he'll take what he can get for sure
Husky?
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      02-09-2014, 04:19 PM   #10
tc535i
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Husky?
Yup, hair tumbleweeds are just out of frame!
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      02-09-2014, 05:26 PM   #11
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Husky?
Yup, hair tumbleweeds are just out of frame!
Hahaha that's great! Have two myself
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      02-09-2014, 05:33 PM   #12
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Yup, hair tumbleweeds are just out of frame!
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      02-10-2014, 12:47 PM   #13
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girlfriend gave him a good brushing yesterday

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      02-10-2014, 02:48 PM   #14
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Should of just bought it from bms website. Accuracy is key
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      02-21-2014, 12:02 PM   #15
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Do you think I should get Dual Coned intake + JB4 (Stage3) I haven't done much to the engine other then a BOV. And what are some of the issues you guys are having with it?

Edit: Its a n54 07 e92

Last edited by LastPrince; 02-21-2014 at 12:04 PM. Reason: no info
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      02-21-2014, 12:12 PM   #16
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girlfriend gave him a good brushing yesterday

Thank god my German Shepherd doesn't shed like that.
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      02-21-2014, 07:01 PM   #17
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Do you think I should get Dual Coned intake + JB4 (Stage3) I haven't done much to the engine other then a BOV. And what are some of the issues you guys are having with it?

Edit: Its a n54 07 e92
Go for it! I put one in my 335 with the DCI and the thing is an animal. I turned it to map zero after driving it for a week on map 1 and 5 and it felt like it was slow. These cars are by no means slow stock, but putting the jb4 on there turned it into a rocket. I would highly recommend you do it.
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