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BMW 5-Series (G30) Forum Engine, Exhaust, Drivetrain, Tuning Modifications M550i Downpipe

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      09-20-2019, 10:59 AM   #1
SXY550
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M550i Downpipe

I am thinking of getting an ARM MOTORSPORT cat-less downpipe for my G30 M550i soon, but I have a few questions before I install it. My current set up is Stage 1 Dinan tune and resonator delete. Does the cabin smell at all? How much is drone when it is idling/driving? How loud is it under comfort mode? Is it damaging to my muffler since the car is almost straight piped? Would you recommend me getting it?
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      09-29-2019, 07:52 PM   #2
deepat04
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Quote:
Originally Posted by SXY550 View Post
I am thinking of getting an ARM MOTORSPORT cat-less downpipe for my G30 M550i soon, but I have a few questions before I install it. My current set up is Stage 1 Dinan tune and resonator delete. Does the cabin smell at all? How much is drone when it is idling/driving? How loud is it under comfort mode? Is it damaging to my muffler since the car is almost straight piped? Would you recommend me getting it?


+1

Looking to do same thing also have res delete. On the fence because of my own current lack of knowledge on adding downpipe
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      09-30-2019, 06:34 PM   #3
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As an owner of 540i decated woth armyteix exhaust.
1. Yes U can smell it. Also when U stop or revers inside your cabin.

2. I have turned off cold start so it queit on start up and woth valves closed its even quiter than my stock exhaust.
3. Its not that bad with drone. If your car had drone it will drone more but if U didin notice that earlier ot will not suddenly apper. Drone depends mostly from middle and rear section of exhaust.

Its all depends what U realy need. I wanted max free flow and now it has 470hp and 600nm (it can have much more bud for engine safety it is on that level). Bit if u dont need super hyper loud car go form 200 cell dp. Less pops and pure sound, but not smell.
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      10-03-2019, 03:04 PM   #4
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If it smells inside the cabin, your downpipe does not fit well and you have a leak.

Wait for a trusted brand to release their downpipe
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