My new exhaust mods - Macht Schnell downpipes and Vibrant resonators (pics/video)

tscdennab · 03-24-2011, 04:59 PM

So I removed my secondary cats a few weeks ago (I already had the primaries removed) and Oh My God...the exhaust became loud as hell and it had a mad rasp, you cannot imagine how bad it sounded. Between 1800 and 2000RPM, in neutral or under load, it sounded like a lot of metal parts were grinding very loudly against each other. Basically like running open headers. Drone was not existent though thanks to the BMW Performance Exhaust.

First I replaced my OEM catless downpipes (cats replaced with pipe) with Macht Schnell 3" coated downpipes. I couldn't feel any improvement in performance or in sound, although maybe the rasp moved a couple hundred RPMs lower in the rev range. The downpipes fitted absolutely perfectly and the ceramic coating looks extremely good. The welds are also perfectly done, I am very happy with them. For $610 coated (I got a deal but it's not hard to get such a deal from MS), I think these downpipes have the highest quality/price ratio. I highly recommend them.

But what about the rasp ? I immediately ordered a pair of Vibrant 1792 resonators, and I welded them where the secondary cats used to be. I honestly didn't expect a big improvement because they are quite short (12") and straight-through inside and they couldn't possibly improve such a bad rasp and such a loud sound. Wrong ! The rasp is 100% gone and the exhaust is much quieter, identical or less loud than when I had all the cats installed ! It's absolutely incredible how a pair of $45 straight-through resonators have such an enormous effect on the exhaust note and loudness.

Conclusion: I am extremely happy with my setup. The BMW Performance Exhaust + Macht Schnell catless downpipes + Vibrant 1792 resonators produces deep, drone-free, rasp-free and not too loud sound while maintaining the performance of a fully catless setup.

Below you can find some pictures and a video of the sound.

cn555ic · 03-24-2011, 05:34 PM

That's the same location I installed my vibrant resonators too!! It is truly amazing how these resonators gets rid of the rasp!

tscdennab · 03-25-2011, 02:09 PM

Some more driving thoughts: the car definitely pulls better especially over 3500RPM. I would say I might gain about 15hp or maybe even more from the 3" downpipes (I had 2.5" before) and secondary cats removal.Dyno on Monday...we shall see

Trojan4evr · 03-25-2011, 02:20 PM

sounds great. I really like it.

Tzu · 03-25-2011, 03:23 PM

That does sound great! I've always wondered about that whistle noise as the engine winds down though, it seems very common. Or is it just a trick the camera plays?

tscdennab · 03-25-2011, 03:41 PM

Quote:

Originally Posted by Tzu

That does sound great! I've always wondered about that whistle noise as the engine winds down though, it seems very common. Or is it just a trick the camera plays?

Thanks. The whistle noise is real, but it's not so loud in person and only present when car is in neutral.

Mr. 5 · 03-25-2011, 04:10 PM

Resonators take away high pitched sounds such as rasp.
They don't do squat with drone.

only1 · 03-25-2011, 04:12 PM

Sounds good. Any chance you can get some drive by video id like to hear it at part and full throttle driving.
Did the resonators take away any of the exhaust note? I have ar catless downpipes with the bmw pe and i dont want it to change i just want to remove the secondary cats.

tscdennab · 03-25-2011, 04:45 PM

Quote:

Originally Posted by only1

Sounds good. Any chance you can get some drive by video id like to hear it at part and full throttle driving.
Did the resonators take away any of the exhaust note? I have ar catless downpipes with the bmw pe and i dont want it to change i just want to remove the secondary cats.

I was in your situation exactly. I had BMW PE and catless downpipes and then replaced the secondary cats with straight pipe. OMG. After you remove the secondary cats you will notice that the exhaust will become at least twice as loud, with an extremely bad rasp which wasn't apparent with the cats on. When you start the car the metal sound is unbelievable. You NEED the resonators. They will put you back where you were when you had all the cats on (including stock downpipes), as far as loudness. Maybe a tad louder. It will be less loud than your current setup, maybe 20% quieter. The sound detail is preserved (minus the rasp), but the camera cannot record sound properly to show it.

I bought the resonators from eBay, just type "vibrant 1792" and select the cheapest price. There is a very slim chance to do a drive-by, I don't have anyone to hold the camera (gf is sick and I don't really hang out with friends)

only1 · 03-25-2011, 06:44 PM

Thanks man.

bulldog x6 · 06-14-2011, 03:58 PM

got this same setup installed today. Resonators were key to get rid of rasp with catless DP. Exhaust sounds mean, raw but civilized, no rasp and barely ANY drone on the highway (6MT). Thanks for the insight into this - very happy I followed a similar path.

tscdennab · 06-14-2011, 04:18 PM

Quote:

Originally Posted by turkish335

got this same setup installed today. Resonators were key to get rid of rasp with catless DP. Exhaust sounds mean, raw but civilized, no rasp and barely ANY drone on the highway (6MT). Thanks for the insight into this - very happy I followed a similar path.

bulldog x6 · 06-14-2011, 04:37 PM

Quote:

Originally Posted by tscdennab

dude thank you for posting up the video and pics etc. The video sounds awesome, but in person, does it no justice at all - sounds amazing. Perfect setup - thanks again for your recommendation and initial post.

i2iSTUDIOS · 06-14-2011, 09:41 PM

wow that sounds great!

99three · 06-14-2011, 09:47 PM

That sounds good. I may do the same with my AR DP's and Bastuck exhaust. I'm wondering if this set up yields a bit more hp numbers?

wren57 · 06-14-2011, 10:53 PM

Can you please get a flyby or some in cabin video?

tibra1 · 06-14-2011, 11:06 PM

Quote:

Originally Posted by Mr. 5

Resonators take away high pitched sounds such as rasp.
They don't do squat with drone.

+1

PeteW84 · 06-14-2011, 11:09 PM

Sounds good

.

bulldog x6 · 06-15-2011, 07:16 AM

Quote:

Originally Posted by wren57

Can you please get a flyby or some in cabin video?

Ill try to get some videos this weekend

marvel48 · 08-15-2011, 03:27 PM

Can we get more Catless Downpipe to Resonator instead of Secondary Cat videos please?

geterdone · 10-04-2011, 02:54 AM

Did you just use the stock mid-pipes, cut the cats out, and replace with resonators?

thebigragu99 · 10-04-2011, 03:53 AM

Sounds great !! Sorry to jack the thread I'm selling 2 brand new vibrints like these for $90 shipped in the box still!!Pm me lmk people thanks!!

03-24-2011, 04:59 PM	#1
tscdennab Banned 110 Rep 1,809 Posts Drives: BMW 335i Join Date: Oct 2010 Location: Europe iTrader: (0) Garage List 2008 BMW [3.12]	My new exhaust mods - Macht Schnell downpipes and Vibrant resonators (pics/video) So I removed my secondary cats a few weeks ago (I already had the primaries removed) and Oh My God...the exhaust became loud as hell and it had a mad rasp, you cannot imagine how bad it sounded. Between 1800 and 2000RPM, in neutral or under load, it sounded like a lot of metal parts were grinding very loudly against each other. Basically like running open headers. Drone was not existent though thanks to the BMW Performance Exhaust. First I replaced my OEM catless downpipes (cats replaced with pipe) with Macht Schnell 3" coated downpipes. I couldn't feel any improvement in performance or in sound, although maybe the rasp moved a couple hundred RPMs lower in the rev range. The downpipes fitted absolutely perfectly and the ceramic coating looks extremely good. The welds are also perfectly done, I am very happy with them. For $610 coated (I got a deal but it's not hard to get such a deal from MS), I think these downpipes have the highest quality/price ratio. I highly recommend them. But what about the rasp ? I immediately ordered a pair of Vibrant 1792 resonators, and I welded them where the secondary cats used to be. I honestly didn't expect a big improvement because they are quite short (12") and straight-through inside and they couldn't possibly improve such a bad rasp and such a loud sound. Wrong ! The rasp is 100% gone and the exhaust is much quieter, identical or less loud than when I had all the cats installed ! It's absolutely incredible how a pair of $45 straight-through resonators have such an enormous effect on the exhaust note and loudness. Conclusion: I am extremely happy with my setup. The BMW Performance Exhaust + Macht Schnell catless downpipes + Vibrant 1792 resonators produces deep, drone-free, rasp-free and not too loud sound while maintaining the performance of a fully catless setup. Below you can find some pictures and a video of the sound. Attached Images
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03-24-2011, 05:34 PM	#2
cn555ic 349 Rep 18,332 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	That's the same location I installed my vibrant resonators too!! It is truly amazing how these resonators gets rid of the rasp!
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03-25-2011, 02:09 PM	#3
tscdennab Banned 110 Rep 1,809 Posts Drives: BMW 335i Join Date: Oct 2010 Location: Europe iTrader: (0) Garage List 2008 BMW [3.12]	Some more driving thoughts: the car definitely pulls better especially over 3500RPM. I would say I might gain about 15hp or maybe even more from the 3" downpipes (I had 2.5" before) and secondary cats removal.Dyno on Monday...we shall see
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03-25-2011, 02:20 PM	#4
Trojan4evr BMW Collector 24 Rep 1,590 Posts Drives: '07 E90 335i/ '11 E82 DCT 135i Join Date: Oct 2009 Location: Socal iTrader: (0) Garage List 2011 BMW/ E82 135i [0.50] 2007 BMW/ E90 335i [2.75]	sounds great. I really like it. __________________ 1. 2011 E82 135i DCT M-tec(Gone but not forgotten----> Totaled) 2. 2007 E90 335i JB Step(Gone but not forgotten---> grad school fund)
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03-25-2011, 03:23 PM	#5
Tzu Lieutenant Colonel 21 Rep 1,542 Posts Drives: 335i Join Date: Jun 2010 Location: Toronto iTrader: (1)	That does sound great! I've always wondered about that whistle noise as the engine winds down though, it seems very common. Or is it just a trick the camera plays?
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03-25-2011, 04:10 PM	#7
Mr. 5 Modder Raider 517 Rep 8,629 Posts Drives: M3 Join Date: Apr 2007 Location: Surf City, HB iTrader: (31) Garage List 2007 e90 335i [4.00]	Resonators take away high pitched sounds such as rasp. They don't do squat with drone. __________________ e36 M3 Coupe, e36 325i Sedan e90 335i--SOLD Best 60-130-------------9.15 Seconds------------------WWW.MR5RACING.COM
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03-25-2011, 04:12 PM	#8
only1 Lieutenant 19 Rep 513 Posts Drives: 07 Z06, 09 e90335i Join Date: Jul 2007 Location: Markham iTrader: (5)	Sounds good. Any chance you can get some drive by video id like to hear it at part and full throttle driving. Did the resonators take away any of the exhaust note? I have ar catless downpipes with the bmw pe and i dont want it to change i just want to remove the secondary cats. Last edited by only1; 03-25-2011 at 04:26 PM.
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03-25-2011, 06:44 PM	#10
only1 Lieutenant 19 Rep 513 Posts Drives: 07 Z06, 09 e90335i Join Date: Jul 2007 Location: Markham iTrader: (5)	Thanks man.
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06-14-2011, 03:58 PM	#11
bulldog x6 Major General 105 Rep 5,045 Posts Drives: '16 MB GLE Join Date: Oct 2008 Location: probably work iTrader: (28)	got this same setup installed today. Resonators were key to get rid of rasp with catless DP. Exhaust sounds mean, raw but civilized, no rasp and barely ANY drone on the highway (6MT). Thanks for the insight into this - very happy I followed a similar path.
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06-14-2011, 09:41 PM	#14
i2iSTUDIOS Captain 49 Rep 870 Posts Drives: BMW 335i Coupe Join Date: Mar 2008 Location: Cincinnati, OH iTrader: (1)	wow that sounds great! __________________ 2007 E92 335i / 6MT / Monaco Blue Metallic / Gray Dakota Leather / Comfort Assist / Premium / Sport / Heated Seats / Navi / Active Steering / Active Cruise Control / Park Distance Control / Rear Sunshade / Sirius MODS PicoTray / M3 Steering Wheel / Front OEM Aero Lip / Bimmian Aluminum Pedals / CDV / Ram Air Scoops / Painted Reflectors / HID 5000k / LED Angels / M Perf. Shifter / Euro Light Switch / 8500 x50 / Center Armrest Pouch / JB4 / BT
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06-14-2011, 09:47 PM	#15
99three Banned 19 Rep 838 Posts Drives: 993, e92, e36, F355, Z32, Jag Join Date: Sep 2010 Location: in the 416 iTrader: (3)	That sounds good. I may do the same with my AR DP's and Bastuck exhaust. I'm wondering if this set up yields a bit more hp numbers?
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06-14-2011, 10:53 PM	#16
wren57 Roll Tide 409 Rep 2,251 Posts Drives: 335i Join Date: Jul 2010 Location: St Louis iTrader: (10)	Can you please get a flyby or some in cabin video? __________________ Fix your broken/stripped cowl bolts with this elegant brass solution! http://www.e90post.com/forums/showthread.php?p=20230306
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06-14-2011, 11:09 PM	#18
PeteW84 COBB'ed 48 Rep 2,230 Posts Drives: 13 Mini Cooper S Join Date: Apr 2008 Location: Tinley Park, IL iTrader: (1) Garage List 2008 335i [3.78]	Sounds good . __________________ 13 Mini Cooper S 08 E92 335i (SOLD)
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08-15-2011, 03:27 PM	#20
marvel48 Banned 4 Rep 121 Posts Drives: 335i 6sp Join Date: May 2010 Location: Trumbull, CT iTrader: (2)	Can we get more Catless Downpipe to Resonator instead of Secondary Cat videos please?
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10-04-2011, 02:54 AM	#21
geterdone Private First Class 2 Rep 144 Posts Drives: 2007 335i Join Date: Mar 2011 Location: Yukon, Oklahoma iTrader: (1)	Did you just use the stock mid-pipes, cut the cats out, and replace with resonators?
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10-04-2011, 03:53 AM	#22
thebigragu99 Banned 28 Rep 828 Posts Drives: 135 tuorbbo Join Date: Aug 2011 Location: nyc iTrader: (1)	Sounds great !! Sorry to jack the thread I'm selling 2 brand new vibrints like these for $90 shipped in the box still!!Pm me lmk people thanks!!
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