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      12-01-2015, 12:30 PM   #1
football76
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Exhaust options for 340i? Same as 335i?

Hey - just picked up my first BMW last week, really happy with it so far (silver on red, M-sport). I'm already feeling the desire for a little more exhaust note. My main question is if fitment for the 340i is the same as the 335i for cat-back/axle-back exhausts? I'm not looking to go all out (my car sees regular baby hauling duty), but definitely wouldn't mind a little more sound in sport mode!

Also open to any suggestions! Thanks fellas
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      12-03-2015, 09:47 AM   #2
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Quote:
Originally Posted by football76
Hey - just picked up my first BMW last week, really happy with it so far (silver on red, M-sport). I'm already feeling the desire for a little more exhaust note. My main question is if fitment for the 340i is the same as the 335i for cat-back/axle-back exhausts? I'm not looking to go all out (my car sees regular baby hauling duty), but definitely wouldn't mind a little more sound in sport mode!

Also open to any suggestions! Thanks fellas
I'm not certain 100% but when I saw posts of the underside of a 340i the exhaust looked different. The M performance for the 340 looked different as well. Doesn't mean it won't bolt up to a 335 but...

I say wait it out at least til spring and there will be plenty of vendors working on it. And good job on the B58 from the people I've been talking to its suppose to be one very beefy motor and can take a lot of extra power. There is a nasty tune coming out for it soon
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      12-06-2015, 02:39 PM   #3
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Resonator delete

If I were you, I would cut my resonator! Its great! I posted a blog/video, I personally love it! Resonator delete is going to cost you about $70.
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      12-30-2015, 10:09 AM   #4
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We're working on it
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      12-30-2015, 11:28 AM   #5
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Since it mates to a different engine, I sure hope it's a newly designed exhaust or has certain changes.
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      12-30-2015, 10:18 PM   #6
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Originally Posted by Josh/AWE View Post
We're working on it
This... this is good news!
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      12-31-2015, 08:45 AM   #7
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The 340i exhaust is VERY similar to the 335i exhaust as an axleback. The main different inlet pipe is slightly different angles and the stock can on a 340i is larger then a 335i stock can but its not far off from one another in general. The 340i and the 335i both utilize the same bumper design though so that takes some of the guesswork out of the equation.

Regardless, we actually mounted our first prototype exhaust to our 340i yesterday and I thought it sounded pretty good. Twas a burbling wonder, was pretty intoxicating actually. How close that will be to a final design is anyones guess since I don't know if it droned or not but for a first attempt I was pleasantly surprised.
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      12-31-2015, 10:44 AM   #8
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Quote:
Originally Posted by Josh/AWE View Post
We're working on it
Quote:
Originally Posted by Dinan_Engineering View Post
Regardless, we actually mounted our first prototype exhaust to our 340i yesterday and I thought it sounded pretty good. Twas a burbling wonder, was pretty intoxicating actually. How close that will be to a final design is anyones guess since I don't know if it droned or not but for a first attempt I was pleasantly surprised.
Can't wait to hear how the final products sound
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      01-02-2016, 11:23 PM   #9
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In the meantime, like someone has said, resonator delete!
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      01-03-2016, 12:05 AM   #10
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What does the dyno say?
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      01-04-2016, 03:57 PM   #11
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Quote:
Originally Posted by Dinan_Engineering
The 340i exhaust is VERY similar to the 335i exhaust as an axleback. The main different inlet pipe is slightly different angles and the stock can on a 340i is larger then a 335i stock can but its not far off from one another in general. The 340i and the 335i both utilize the same bumper design though so that takes some of the guesswork out of the equation.

Regardless, we actually mounted our first prototype exhaust to our 340i yesterday and I thought it sounded pretty good. Twas a burbling wonder, was pretty intoxicating actually. How close that will be to a final design is anyones guess since I don't know if it droned or not but for a first attempt I was pleasantly surprised.
Will the exhaust be valve controlled?
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      01-05-2016, 11:35 AM   #12
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Quote:
Originally Posted by goj View Post
Will the exhaust be valve controlled?
We are internally debating which way to go. The stock exhaust has a secondary valve whereas the M Performance exhaust eliminates the valve as an example.

From my understanding the leading design can go either way.

Is there a preference amongst the masses that I should be passing along? =)
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      01-05-2016, 12:09 PM   #13
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Quote:
Originally Posted by Dinan_Engineering
Quote:
Originally Posted by goj View Post
Will the exhaust be valve controlled?
We are internally debating which way to go. The stock exhaust has a secondary valve whereas the M Performance exhaust eliminates the valve as an example.

From my understanding the leading design can go either way.

Is there a preference amongst the masses that I should be passing along? =)
I am a huge fan of what you can do with a valve controlled system. Almost like having a duel nature exhaust in different driving situations.

I would buy dinan in a heartbeat if you went this direction if not I'd probably go with the M performance option from BMW.

That being said I don't know if I am in the majority. :
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      01-05-2016, 12:32 PM   #14
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Quote:
Originally Posted by goj View Post
I am a huge fan of what you can do with a valve controlled system. Almost like having a duel nature exhaust in different driving situations.

I would buy dinan in a heartbeat if you went this direction if not I'd probably go with the M performance option from BMW.

That being said I don't know if I am in the majority. :
Noted. I know the Engineering director favors the valve option but the forum folk I would assume would want to tend to go valveless, i think, just because then its louder all the time. At least that's my perception but maybe I will be proven wrong by this thread.
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      01-05-2016, 12:48 PM   #15
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Quote:
Originally Posted by Dinan_Engineering
Quote:
Originally Posted by goj View Post
I am a huge fan of what you can do with a valve controlled system. Almost like having a duel nature exhaust in different driving situations.

I would buy dinan in a heartbeat if you went this direction if not I'd probably go with the M performance option from BMW.

That being said I don't know if I am in the majority. :
Noted. I know the Engineering director favors the valve option but the forum folk I would assume would want to tend to go valveless, i think, just because then its louder all the time. At least that's my perception but maybe I will be proven wrong by this thread.
I agree with that. Also:

How long does it take for dinan to get products on the market? I know development takes a bit of time.. just curious
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      01-05-2016, 01:13 PM   #16
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Quote:
Originally Posted by goj View Post
I agree with that. Also:

How long does it take for dinan to get products on the market? I know development takes a bit of time.. just curious
Depends on the product. Exhausts and springs are pretty quick in general once we start on them assuming there are no production issues (as an example last year we had some issues with valves that delayed a lot of releases over 2 months). In general those are, a month to 3 month turn, once started. Intakes are longer yet due to tooling. Software in general tends to be the longest leeway since it has the most testing and factors involved and typically is nearly a year long process.

All that said each product can't be shoehorned into a type necessarily and each platform holds its own problems so it really can be all over the place in terms of time lines.
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      01-05-2016, 01:37 PM   #17
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Quote:
Originally Posted by Dinan_Engineering
Quote:
Originally Posted by goj View Post
I agree with that. Also:

How long does it take for dinan to get products on the market? I know development takes a bit of time.. just curious
Depends on the product. Exhausts and springs are pretty quick in general once we start on them assuming there are no production issues (as an example last year we had some issues with valves that delayed a lot of releases over 2 months). In general those are, a month to 3 month turn, once started. Intakes are longer yet due to tooling. Software in general tends to be the longest leeway since it has the most testing and factors involved and typically is nearly a year long process.

All that said each product can't be shoehorned into a type necessarily and each platform holds its own problems so it really can be all over the place in terms of time lines.
Thanks!
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      01-05-2016, 06:01 PM   #18
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I find that the valved exhausts let you have the best of both worlds, you can size the exhaust for good sounds that would normally cause droning at lower RPM.

I have the MPE on my 335 and I find that if I have canflap set to always open you can get some slight droning at lower RPM under load.
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      01-05-2016, 08:04 PM   #19
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Quote:
Originally Posted by goj
I am a huge fan of what you can do with a valve controlled system. Almost like having a duel nature exhaust in different driving situations.

I would buy dinan in a heartbeat if you went this direction if not I'd probably go with the M performance option from BMW.

That being said I don't know if I am in the majority. :
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      01-05-2016, 11:15 PM   #20
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+1 for a valved system. Closed for baby hauling duties, open for cruising.
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      01-06-2016, 08:07 AM   #21
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+1 for valved. Nice to have the option, those who want loud all the time will set it open always and be done with it. The rest of us will love the duel nature. Valved FTW
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      01-09-2016, 02:49 PM   #22
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I think everyone would like to have options (valved), but at what cost? I'm willing to bet this car wont be loud without a secondary valve so it doesn't matter to me. I cant imagine this car being much loud unless both valve are removed along with cats.

But, yeah, more options are better.
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