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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > F30 335 - Exhaust and Downpipe
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      03-09-2012, 12:54 PM   #1
GTM_Challenge
 
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F30 335 - Exhaust and Downpipe - now with video!

As a follow up to our general product development thread here: http://www.f30post.com/forums/showthread.php?t=654924 We have been testing our catback for the F30 335 over the past week. We are playing with some different canisters to get the right amount of sporty sound with no droning or excessive noise. The exhaust will used full 3in piping front to rear ( the OEM pinches down to 2.5in in the front areas) with a dual outlet canister and 3.5in exhaust tips Once we add the catless downpipe, it'll add some more aggressive sound as well as a good bump in power im sure

Here are a few shots we took the other day once the weather cleared up a bit. We'll take some more shots of the exhaust once we have a more finalized version to show.












Video of cold start, to idle, reving, then a quick take off clip! Enjoy





Newest video:

Challenge Sport catback Exhaust with Challenge downpipe with High Flow Cat. The downpipe added a good amount of grunt down low and in the midrange without adding any additional noise at crusing speeds. The cold start is now a bit louder than before and the over all exhaust note is a bit deeper with a hint of turbo noise in it When the Ecu is put in sport mode, you also get a bit more burble and poping noise off throttle



Last edited by GTM_Challenge; 06-05-2012 at 05:27 PM.
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      03-09-2012, 01:43 PM   #2
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Beautiful Tips! drooling now ...
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      03-09-2012, 02:48 PM   #3
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Yes, beautiful tips. I'm drooling too. How about a video to hear the sound?
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      03-09-2012, 05:51 PM   #4
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lookin good!!
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      03-09-2012, 06:20 PM   #5
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how does it sound?
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      03-09-2012, 07:12 PM   #6
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Nice but they're not centred into the spaces in the diffuser.
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      03-09-2012, 08:33 PM   #7
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Quote:
Originally Posted by jtuds View Post
Nice but they're not centred into the spaces in the diffuser.
chill its a prototype
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      03-09-2012, 09:40 PM   #8
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Nothing like a nice big pair of tips.
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      03-09-2012, 10:12 PM   #9
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Anything for the 328i?
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      03-11-2012, 11:16 AM   #10
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Quote:
Originally Posted by jtuds View Post
Nice but they're not centred into the spaces in the diffuser.
They are actually perfectly center. It's just the angle of that rear shot that it looks off for some reason.
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      03-11-2012, 11:18 AM   #11
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Quote:
Originally Posted by iwannabimmer View Post
Yes, beautiful tips. I'm drooling too. How about a video to hear the sound?
I'm hoping to do some clips this week since we should have some nice weather
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      03-11-2012, 02:49 PM   #12
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WOW. That is super clean. Love it. would love to hear it.
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      03-12-2012, 02:29 PM   #13
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Quote:
Originally Posted by clarence View Post
Anything for the 328i?
328 parts will be completed just after the 335i parts
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      03-23-2012, 01:59 PM   #14
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Just got some of the prototype machined parts for the down pipe and exhaust for the 335 as well as the aluminum ends for the intercooler. These aluminum couplers will allow the use of the OEM special clip in quick connectors for an OEM fit!

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      03-29-2012, 09:37 PM   #15
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Took some go pro videos from the rear of the exhaust on the street at wide open throttle, start up, and some casual driving. We'll try to get them posted mid next week. We are moving to our new facility at the moment!
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      05-03-2012, 12:42 AM   #16
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What happened? Thought you were going to post some vids!!!
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      05-06-2012, 12:08 PM   #17
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Quote:
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What happened? Thought you were going to post some vids!!!
As soon as we catch the next break in clear weather here the vids will be done.
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      05-08-2012, 06:48 PM   #18
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Looks awesome, looking forward to hearing it. What kind of exhaust note are you going for? I'm a big fan of just a deep throaty rumble and no rasp at WOT.
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      05-30-2012, 08:27 AM   #19
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Thats it, GT motoring you guys have to paint that 335i, Cause every time I look at it I go damn that new part looks so good on the alpine white I have to get it... Long story short your going to break my bank and my promise that I wouldn't put any money into this car Bhahaha!

Looks sick though, please pm when you have a down pipe, I want to just go down pipe and chip rather than the whole exhaust... I say this until you tell me you have the exhaust w/black tips to match oem and then I will have a turbo back exhaust on order
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      05-31-2012, 01:27 AM   #20
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When will the CATLESS Downpipes be available ?
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      05-31-2012, 03:59 PM   #21
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Quote:
Originally Posted by GTM_Challenge View Post
As soon as we catch the next break in clear weather here the vids will be done.
Umm.. that was a month ago...

Vids or GTFO!
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      05-31-2012, 04:09 PM   #22
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Quote:
Originally Posted by luigimaster24 View Post
When will the CATLESS Downpipes be available ?
The exhaust should be out sometime in June and the downpipes should be available in July.
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