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      07-21-2019, 10:12 AM   #1
proteus290
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Drives: 2014 BMW X1 35I
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Smile New Exhaust and Tune for 14 35I X! N55

2014 X1 35I


Looking for some nice parts to upgrade :

have stock N55 need to get this pepped up exhaust mods

dinan tune

or jb 4

down pipe
charge pipe
exhaust
etc

please advise

any local help for this project located in austin? mechanical wisdom welcome
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      07-23-2019, 01:41 PM   #2
BmoreBimmerX1
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I can't comment on the BMS JB4 but many people on here seem to have good experiences with it. I had the stage 1 tune from BMS and didn't like it. The power delivery was all over the place. I currently have the Dinan stage 2 software. The power doesn't feel that much more than stock but there's definitely a bump. Zero throttle or power issues. Feels like stock plus.

Charge pipe upgrade is a must on N55. Mine went while I was under warranty and the dealer said it's a wear/tear item and wouldn't cover it.

As far as exhaust, there aren't many direct bolt-on options for our cars. You could use the BMW PE or Dinan from the 135 which will require slight modification but it is totally doable. I had the Active Gen II exhaust and there was just too much resonance for me despite AA saying "no drone." I ended up doing a secondary cat and resonator delete with stock muffler. Sounds good enough for me.
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      07-26-2019, 08:48 AM   #3
themishmosh
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I will be putting my JB4 up for sale soon but have a vacation coming up so not really interested in moving it at the moment. Already sold my X1 N55 for a 2020 Explorer ST because I needed the size.

I think the biggest thing about the JB4 is the codes that pop up on even a properly working car. It used to clear codes automatically but if you are on the current ISO software or purchase a new one, they do not and you will need to do that periodically. Otherwise, power is undeniable.
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X1 35i, H&R springs, Bilstein HD shocks, BMS JB4, BMS chargepipe, xHP trans flash
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      07-29-2019, 09:41 PM   #4
bucketfoot
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Must be an N55 thing. I haven't had a single code pop up with the JB4 on my N20.
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      08-04-2019, 01:40 AM   #5
Chicone
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Quote:
Originally Posted by bucketfoot View Post
Must be an N55 thing. I haven't had a single code pop up with the JB4 on my N20.
Do you have the older version? Sounds like it. I want one, maybe I’m wrong but it seems a little like a unpolished product/ hack. The Dinan flash sounds OK but there is no way to tweak it. There are other options too but they seem limited/ not as good. I’m plowing ahead with the chargepipe and then probably the downpipe, and hopefully by the time I get em done, I’ll have the rest figured out or I’ll just cave and get a JB4.
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2015 BMW X1 35i MSport // BMS Intake
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      08-05-2019, 09:06 AM   #6
bucketfoot
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Quote:
Originally Posted by Chicone View Post
Do you have the older version?
Just bought it last year, so not likely. but again, I've got the N20/28i version not the N55/35i one.
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      08-13-2019, 09:09 PM   #7
NemoX1
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I have a jb4 and a catless downpipe that I recently removed from my 2014 Xdrive35i. Had them on the car about a year. Went back to stock. I haven't researched the resale market on these. Make me an offer? I'm in Arizona.
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