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2Addicts | BMW 2-Series forum Technical Topics N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning 228i dual exhaust options

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      09-01-2016, 06:41 PM   #1
Scibike1874
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228i dual exhaust options

Hello everyone. Looking for some advice. I would like to do a dual exhaust setup on my 228i. Through local performance shop has a 335i stock exhaust for 400.00 and they are able to weld it on. Not sure of the sound will any better than the stock 228i exhaust. Should I hold out for an M235i performance exhaust?
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      09-01-2016, 10:04 PM   #2
fancyfl1ght
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I'd recommend. . .

Quote:
Originally Posted by Scibike1874 View Post
Hello everyone. Looking for some advice. I would like to do a dual exhaust setup on my 228i. Through local performance shop has a 335i stock exhaust for 400.00 and they are able to weld it on. Not sure of the sound will any better than the stock 228i exhaust. Should I hold out for an M235i performance exhaust?
Against it. It adds complexity and weight for which there is no return on investment. Dual exhaust might look good, but provide no appreciable performance benefit IMO. This goes for the M2 dual exhaust as well. Purely cosmetic.

If you are considering an upgrade, I would recommend removing your stock downpipes and replace it with an after market downpipe without restrictive cats first to improve power. You will notice a nice growl from the stock exhaust as it tries to grapple with the extra amount of air it has to handle.

If your less aggressive an axle back would be okay. You get the growl with a marginal performance gain.

I am currently interested in the Dinan axle back exhaust because I live in the United Socialist Republic of California and they have eco nazis working at the DMV and where you get exhaust gases measured for having downpipes!
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      09-02-2016, 03:57 AM   #3
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Quote:
Originally Posted by Scibike1874 View Post
Hello everyone. Looking for some advice. I would like to do a dual exhaust setup on my 228i. Through local performance shop has a 335i stock exhaust for 400.00 and they are able to weld it on. Not sure of the sound will any better than the stock 228i exhaust. Should I hold out for an M235i performance exhaust?
With a stock 35i muffler you won't notice much difference in sound, so if you're looking to make it louder then don't bother with that, just go straight to a louder one
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      09-02-2016, 03:37 PM   #4
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I am also in CA and have the Dinan catback pipes. Small HP bump, great sound compared with stock, well worth it. FWIW, I wouldn't dream of getting a cosmetic twin exhaust setup. For a start, would there even be a compatible diffuser?
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      09-02-2016, 04:54 PM   #5
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It's a slightly challenging process. I could either have the stock diffuser cut to accommodate the other exhaust tip. I could aslo find a stock or a carbon fiber M235i rear diffuser. I saw a post not long ago online of someone using an M235i M performance exhaust on a 228i. It sounded great in a parking garage. I have an msport x drive 228i. My options are limited. It's costly just for the second exhaust tip.
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      09-03-2016, 05:03 AM   #6
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Quote:
Originally Posted by BarryJI View Post
I am also in CA and have the Dinan catback pipes. Small HP bump, great sound compared with stock, well worth it. FWIW, I wouldn't dream of getting a cosmetic twin exhaust setup. For a start, would there even be a compatible diffuser?
Quote:
Originally Posted by Scibike1874 View Post
It's a slightly challenging process. I could either have the stock diffuser cut to accommodate the other exhaust tip. I could aslo find a stock or a carbon fiber M235i rear diffuser. I saw a post not long ago online of someone using an M235i M performance exhaust on a 228i. It sounded great in a parking garage. I have an msport x drive 228i. My options are limited. It's costly just for the second exhaust tip.
All M235i stock and aftermarket diffusers are compatible with the 228i/220i diffusers provided you have the M Sport rear bumper and matching exhaust. 35i exhausts will fit directly except for the midpipe connection which will require some custom work as the diameters are different
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      08-14-2019, 09:31 PM   #7
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Quote:
Originally Posted by Icy J View Post
Quote:
Originally Posted by BarryJI View Post
I am also in CA and have the Dinan catback pipes. Small HP bump, great sound compared with stock, well worth it. FWIW, I wouldn't dream of getting a cosmetic twin exhaust setup. For a start, would there even be a compatible diffuser?
Quote:
Originally Posted by Scibike1874 View Post
It's a slightly challenging process. I could either have the stock diffuser cut to accommodate the other exhaust tip. I could aslo find a stock or a carbon fiber M235i rear diffuser. I saw a post not long ago online of someone using an M235i M performance exhaust on a 228i. It sounded great in a parking garage. I have an msport x drive 228i. My options are limited. It's costly just for the second exhaust tip.
All M235i stock and aftermarket diffusers are compatible with the 228i/220i diffusers provided you have the M Sport rear bumper and matching exhaust. 35i exhausts will fit directly except for the midpipe connection which will require some custom work as the diameters are different
Quote:
Originally Posted by Icy J View Post
Quote:
Originally Posted by BarryJI View Post
I am also in CA and have the Dinan catback pipes. Small HP bump, great sound compared with stock, well worth it. FWIW, I wouldn't dream of getting a cosmetic twin exhaust setup. For a start, would there even be a compatible diffuser?
Quote:
Originally Posted by Scibike1874 View Post
It's a slightly challenging process. I could either have the stock diffuser cut to accommodate the other exhaust tip. I could aslo find a stock or a carbon fiber M235i rear diffuser. I saw a post not long ago online of someone using an M235i M performance exhaust on a 228i. It sounded great in a parking garage. I have an msport x drive 228i. My options are limited. It's costly just for the second exhaust tip.
All M235i stock and aftermarket diffusers are compatible with the 228i/220i diffusers provided you have the M Sport rear bumper and matching exhaust. 35i exhausts will fit directly except for the midpipe connection which will require some custom work as the diameters are different

Any chance you could link me to a step clamp that I could use for this project? 80mm to 75mm
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      08-14-2019, 10:13 PM   #8
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I was spoiled by the fact the previous owner of my 228i installed M performance exhaust, so I can’t speak to the process of installation or weighing against a different option, however, the thing sounds wonderful.

I am looking into deactivating the active sound feature now because it’s really not necessary and is also just a ridiculous feature to begin with, IMO. — I agree with others here that it definitely doesn’t make much difference in performance to go dual, just visual and audio cosmetic appeal, mostly.. — that said, I wouldn’t want any other setup on this car.
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      08-19-2019, 07:22 AM   #9
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Quote:
Originally Posted by PeanuKeeyes View Post
I was spoiled by the fact the previous owner of my 228i installed M performance exhaust, so I can’t speak to the process of installation or weighing against a different option, however, the thing sounds wonderful.

I am looking into deactivating the active sound feature now because it’s really not necessary and is also just a ridiculous feature to begin with, IMO. — I agree with others here that it definitely doesn’t make much difference in performance to go dual, just visual and audio cosmetic appeal, mostly.. — that said, I wouldn’t want any other setup on this car.
You can code out ASD with Carly or any of the other feature-coding software apps. I've done that on my 228i and my M3 - huge difference and well worth it.
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