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2Addicts | BMW 2-Series forum Technical Topics N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning Anyone here got a downpipe on their car?

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      04-23-2016, 04:31 PM   #1
F22santiago
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Anyone here got a downpipe on their car?

Looking to get a downpipe for my car. I was wondering if anyone with one could share some first impressions. Sound maybe? Any difference in power? I have a JB4 as well if that makes a difference
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      04-23-2016, 04:34 PM   #2
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Quote:
Originally Posted by F22santiago View Post
Looking to get a downpipe for my car. I was wondering if anyone with one could share some first impressions. Sound maybe? Any difference in power? I have a JB4 as well if that makes a difference
First mods were Afe intake, Jb4 and ER catless.

First drive in Map 2 was: Wow.

Today running Map 3 or 7 and have added Wagner EVO II IC, ER chargepipes, BMS Meth and race gas. Boost increased from ~14psi to 17psi+. Big difference but probably max for stock turbo.
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      04-23-2016, 05:38 PM   #3
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Downpipe is the best thing you can do besides a tune/JB4 and the sound will also change. Try searching, there's plenty of threads on here with information on downpipes.
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      04-23-2016, 06:37 PM   #4
F22santiago
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Quote:
Originally Posted by Mywifes335 View Post
First mods were Afe intake, Jb4 and ER catless.

First drive in Map 2 was: Wow.

Today running Map 3 or 7 and have added Wagner EVO II IC, ER chargepipes, BMS Meth and race gas. Boost increased from ~14psi to 17psi+. Big difference but probably max for stock turbo.
The jb4 should automatically take care of not trigging a check engine light because of the catless downpipe right?
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      04-23-2016, 08:30 PM   #5
Mywifes335
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Quote:
Originally Posted by F22santiago View Post
The jb4 should automatically take care of not trigging a check engine light because of the catless downpipe right?
Yup. No CEL.
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      04-25-2016, 07:36 PM   #6
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Quote:
Originally Posted by F22santiago View Post
Looking to get a downpipe for my car. I was wondering if anyone with one could share some first impressions. Sound maybe? Any difference in power? I have a JB4 as well if that makes a difference
Cold start will be louder, wide open throttle will be louder ... Normal driving will be the same

I have catless DP on all BMW cars I owned, sounds great!

JB4 + DP on map 2 makes serious power

Here is a dyno for comparison betweek stock vs map 1 (JB4 only) and map 2 (JB4 + DP)

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