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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Exhaust Question - Magnaflow N54 to N55?



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      05-13-2011, 01:24 PM   #1
IancoleTX
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Exhaust Question?

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Last edited by IancoleTX; 10-05-2011 at 03:23 PM.
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      05-13-2011, 01:54 PM   #2
Brey335i
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Looks like the N54 unit is designed to keep the stock secondary catalytic converters and slip on right after them. And the N55 doesn't have secondary catalytic converters so it bolts straight to the downpipe.
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      05-13-2011, 01:59 PM   #3
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yea, you should sell it and pick up the correct exhaust. if you do sell it...let me know =)

*shameless plug
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      05-13-2011, 03:00 PM   #4
Brey335i
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Quote:
Originally Posted by IancoleTX View Post
This is useful.. so I would have to have a shop fab flanged pipes to run from the DP to these slip on units.. How much of a pain would this be?
Very little pain. They should have no problem doing that. Or you can slip it on your stock exhaust but that requires cutting... I'd go by an exhaust shop and check if I were you. Remember that for the cleanest install you want them to also make those flanges that bolt to the downpipes
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      05-13-2011, 03:38 PM   #5
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Quote:
Originally Posted by IancoleTX View Post
Thanks for the input, that's pretty much what I thought.. not at all trying to cut up the stock exhaust so I will probably just get it fabbed up
Yeah that's definitely what I would do too. It's such a small job that it's worth it to be able to save your stock exhaust
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