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      12-05-2018, 01:24 PM   #1
xphiberoptikx
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2018 330i / B48 Downpipe Install Experience?

I have found numerous videos of older models with NXX engines but none that are for the B48. Has anyone found a video to support DIY install of a catless downpipe on the B48? If not, but you have experience, how different is it from the Kies Motorsports N55 DIY video:


Thanks in advance!
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      12-05-2018, 07:17 PM   #2
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Ok, so I figured out everything... except how to remove the upper brace bolt that holds the brace to the transmission. What is the technique because I can hardly get a hand up there from the bottom, let alone a ratchet. When I can get a ratchet on it, there's no room to ratchet left or right. What is the trick?
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      12-05-2018, 07:32 PM   #3
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      12-05-2018, 08:20 PM   #4
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Maybe pickup a fine-toothed ratchet? One with less degrees between each tooth.
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      12-05-2018, 10:19 PM   #5
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Quote:
Originally Posted by Sweeney921 View Post
Maybe pickup a fine-toothed ratchet? One with less degrees between each tooth.
I may try that but the spacing honestly doesn't even feel like there is enough room for any noticeable movement. And even if I was using air tools, I don't think an air wrench would fit up there. One of my ratchets wouldnt even fit because the head was too wide.
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      12-06-2018, 06:15 AM   #6
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What about a small torx wrench to break the torque?

http://www.lowes.com/pd_445713-KDT92...uctId=50164687
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      12-06-2018, 10:51 AM   #7
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Quote:
Originally Posted by Sweeney921 View Post
What about a small torx wrench to break the torque?

http://www.lowes.com/pd_445713-KDT92...uctId=50164687
I am not sure that would be long enough to get up there. I had to put an extension on my ratchet just to be able to put any leverage on it
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      12-10-2018, 11:55 AM   #8
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Just to close this out, I ended up getting it using this combo: Socket > universal joint > 1.5" wobble > 10" wobble extension > 8" standard extension > 120-tooth ratchet.

Thanks ya'll!
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      12-10-2018, 03:31 PM   #9
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Wow, that is one hell of a tool arrangement to get that bolt out. Good job!

Any chance you can post a photo looking into the stock downpipe inlet? Curious to see how restrictive the catalyst is.

Also, let us know what your thoughts are on the aftermarket downpipe performance. I think you're one of the very first to take this project on.
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      12-16-2018, 08:32 PM   #10
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Quote:
Originally Posted by xphiberoptikx View Post
Just to close this out, I ended up getting it using this combo: Socket > universal joint > 1.5" wobble > 10" wobble extension > 8" standard extension > 120-tooth ratchet.

Thanks ya'll!
OP, what's your impression of the ER downpipe for your B46? Wondering about sound, smell, power, CEL, etc.
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      12-21-2018, 04:43 AM   #11
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I got mine changed to a catless downpipe sometime ago but unfortunately the welder didnt do a really good job and apparently the flange cracked and decided to look for another custom downpipe and now it works perfectly...
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      11-07-2019, 05:21 PM   #12
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Hi. How did you remove the upper brace bolt that holds the brace to the transmission. I saw there has 2 Troy bolts, only can see the button one, can not reach the top bolts. Also, how many parts did you remove? It's really a hard work - -
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      02-02-2020, 06:10 AM   #13
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Quote:
Originally Posted by xphiberoptikx View Post
I have found numerous videos of older models with NXX engines but none that are for the B48. Has anyone found a video to support DIY install of a catless downpipe on the B48? If not, but you have experience, how different is it from the Kies Motorsports N55 DIY video:


Thanks in advance!
Can you show me what the downpipe you used looks like please? Ive got a 320i b48 but jot sure if ive got the correct part
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