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      12-22-2013, 10:22 AM   #1
BMW_M135i
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BMW M135i Aftermarket Exhaust Battle - By HK BMW M135i Owners Group

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For your viewing pleasure of the comparison we did!

BCS was the loudest!!

Exhaust Battle Results in Decibals:

M135i Stock 97
Miltek 98
MP 98
Bastuck 100
BCS 101
Jackie Chan Evo IX Dragon 102

Supersprint - No show
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Last edited by BMW_M135i; 12-22-2013 at 11:31 AM.
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      12-22-2013, 10:36 AM   #2
ovekvam
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Is louder better? I thought the main purpose of the exhaust system was to reduce the noise.

I think it would have been more relevant to compare the noise under load than just revving in neutral, but I guess it would also be more difficult.
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      12-22-2013, 10:37 AM   #3
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Nice video! I know they'll sound different under load but the Miltek sounded the best, more refined. M Performance was sweet but at high revs it sounded tinny.

Need to do a drive-by and full driving sound battle !

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      12-22-2013, 10:43 AM   #4
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It's pretty hard in HK, we don't have many open spaces and we can get ticket for just revving the engine like that.

BCS was the best overall performer on the road when driving and also by sound.

We had a member that owns a car with the SuperSprint but he didn't show up
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      12-22-2013, 10:50 AM   #5
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Great vid. Really helps us a lot to see which one sounds best for us. From this vid I would chose the milltek for sure. All is left is maybe a vid with the quad exhausts like supersprint or ac. Anyway I wanted to ask you which of the exhaust had improved (louder/deeper) the thumping noise when you change gears?
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      12-22-2013, 10:57 AM   #6
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Quote:
Originally Posted by raffoul232 View Post
Great vid. Really helps us a lot to see which one sounds best for us. From this vid I would chose the milltek for sure. All is left is maybe a vid with the quad exhausts like supersprint or ac. Anyway I wanted to ask you which of the exhaust had improved (louder/deeper) the thumping noise when you change gears?
We may do a remake later with the Supersprint, but no one installed the AC.

BCS has the most improved noise in my opinion, but u have to be in Sports mode. Comfort mode seems to be close to stock.

My own car is stock, so all of them made a difference lol
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      12-23-2013, 07:42 AM   #7
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WOW nice M135i meet!
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      12-23-2013, 08:21 AM   #8
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They just don't sound good. Damn turbos! Nice cars though.
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      12-23-2013, 09:43 AM   #9
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Nice...Im digging the 1 But I never see them.
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      12-23-2013, 09:56 AM   #10
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It's great to see such a meeting!
Any performance improvements too?
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      12-23-2013, 11:30 AM   #11
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What iPhone app is being used?
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      12-23-2013, 12:57 PM   #12
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is it just me or they all sound the same?
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      12-23-2013, 01:31 PM   #13
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Quote:
Originally Posted by MikeyComputers View Post
is it just me or they all sound the same?
No way, They all differ from one another. Listen carefully
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      12-23-2013, 04:17 PM   #14
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Quote:
Originally Posted by MikeyComputers
is it just me or they all sound the same?
More or less imo. But the Militek sounded best. My mate has an M135i so he now knows what not to choose; I think he'll keep it stock lol.

Thanks for sharing.

Cheers
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      12-23-2013, 04:37 PM   #15
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Quote:
Originally Posted by Robin_NL View Post
More or less imo. But the Militek sounded best. My mate has an M135i so he now knows what not to choose; I think he'll keep it stock lol.

Thanks for sharing.

Cheers
Robin
+1, I liked the Miltek the best. But everyone will be different.
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      12-23-2013, 05:17 PM   #16
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For the owner of the car, what matters is the sound inside the car (because that is where the owner will be when the engine is running), and it is enhanced by a computer. I guess it would be a better strategy to chip tune that synthesizer than changing the outer tubing.
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      12-23-2013, 07:57 PM   #17
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Too bad we do not have this hatch in the US
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      12-23-2013, 11:08 PM   #18
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Wow. I thought those were vw GTIs lol.
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      12-24-2013, 02:33 AM   #19
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Sound

Aww, those are cute sounds.
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      12-24-2013, 02:35 AM   #20
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I am stationed in Germany right now and have seen a bunch of these on post.I love the looks of them but never seen any worked so thanks for the vids.
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      12-24-2013, 02:59 AM   #21
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Assuming the M235i and M135i exhaust systems are the same, these aftermarket exhausts can be considered to people who bought the M235i.

Decibal 10th is the app used on the iPhone.

The exhaust does make some performance improvements
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      12-24-2013, 04:17 AM   #22
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I am running milltek with sportcat and disabled the sound generator. Car sounds just perfect now from the inside as well.
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