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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 > N54 Downpipe Fix



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      01-09-2023, 04:04 PM   #1
harrisontjo
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N54 Downpipe Fix

Does anyone know where I can buy a DP fix from for my n54. If not does anyone have one they could sell/lend me?
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      01-09-2023, 04:30 PM   #2
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Have you considered running MHD? It "fixes' the DPs for you.
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      01-09-2023, 04:35 PM   #3
harrisontjo
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I need it to pass emissions where mhd just disabled the catalyst system and you cant pass smog like that
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      01-09-2023, 05:03 PM   #4
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Sounds like you have some different rules than we do up here. The tune's fix solves it for Massachusetts.

Good luck.
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      01-10-2023, 10:32 AM   #5
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Quote:
Originally Posted by harrisontjo View Post
I need it to pass emissions where mhd just disabled the catalyst system and you cant pass smog like that
Can you put the stock DP's back on...get it inspected, and then put the aftermarket ones back on?
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      01-10-2023, 12:11 PM   #6
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Quote:
Originally Posted by iqraceworks View Post
Can you put the stock DP's back on...get it inspected, and then put the aftermarket ones back on?
Or a pair of Cobb catted dp's
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      01-11-2023, 08:37 PM   #7
harrisontjo
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no i dont have the stock ones anymore cause i sold em a while ago
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