Quiet catless exhaust

per · 06-13-2010, 11:18 AM

I am looking for a cat less exhaust who is as quiet as possible, right know I have the RPI midpipes and stock muffler and my neighbors hate me. The sound is very raspy and to loud.

I have some options.
1.Rebuild the RPI mid pipe and adding tvo resonators and an x pipe.to break the exhaust pulsations, I am not sure this will work but I could give it a try.

2.Find a muffler that removes the raspy sound and reduce the sound

3. ??

I have searched the forum but didn’t find anything useful, any advice is welcome.

NatAsp-M3 · 06-13-2010, 12:27 PM

I don't know, Per, I kinda think the resonators do more to reduce drone than overall sound. Even HFCs at 100cell seem to make very substantial differences in sound decrease vs straight downpipes. Borla has a quad resonator catless pipe that won't be too much pocket pain if you don't like it. I've only heard that thing on a stock exhaust, but my bet is on any aftermarket muffler it will drastically increase decibels.

FStop7 · 06-13-2010, 12:29 PM

Cats act as mufflers, by removing thrum the exhaust will be louder. No way around that.

e.n335 · 06-13-2010, 02:23 PM

I'm looking forward to an Evolve X-pipe & Remus street configuration. Second choice for me is the Challenge X-pipe & Remus.

M3Alpine · 06-13-2010, 02:35 PM

quiet and catless... goodluck

dcgolfdr · 06-15-2010, 02:25 PM

I just installed the Dinan midpipe this past weekend and I would say that it doesn't increase the volume of the exhaust that much. I paired the pipe with the Bastuck rear section, which is pretty quiet, but the increase is not a raspy sound, it is more of a deep sound. Doesn't sound like a mustang but it does sound like it has a V8. When you do hit the gas and get above 5000 rpm the sound does increase as well as the power, but for normal driving I don't think the car is much louder than just the rear section. I will try to get some vids later. Look at the vids of the full dinan setup, the Bastuck is more mild than the dinan rear section.

DLSJ5 · 06-15-2010, 04:26 PM

With the Gintani Catless X-pipe/resonators, combined with the stock exhaust, it is not much louder than stock while cruising, it's only loud when you get on it, exactly how I want it.

OMID INC · 06-15-2010, 04:34 PM

remove cats and add resonators. that will quiet it down a little.

808E90 · 06-15-2010, 04:58 PM

Quote:

Originally Posted by DLSJ5

With the Gintani Catless X-pipe/resonators, combined with the stock exhaust, it is not much louder than stock while cruising, it's only loud when you get on it, exactly how I want it.

Are you running 4 or just 2 resonators?

I'm in the same boat as you Per ... I'm just going back to stock x-pipes with a rear system

DLSJ5 · 06-15-2010, 08:11 PM

Quote:

Originally Posted by 808E90

Are you running 4 or just 2 resonators?

I'm in the same boat as you Per ... I'm just going back to stock x-pipes with a rear system

4 resonators, while cruising it's not loud guys, now the Borla was LOUD at every throttle position!

per · 06-23-2010, 10:37 AM

I was not that happy with the sound of the RPI midpipe so this i what i did.
A complete rebuild of the midpipe , with a new X-pipe and two new mufflers, the terrible rasp disappeared it is still quite loud under Vot but this is how i want it, Quiet during cruising and normal driving, and aggressive during vot, i am very happy with the result

M II · 07-02-2010, 11:23 AM

Quote:

Originally Posted by per

I am looking for a cat less exhaust who is as quiet as possible, right know I have the RPI midpipes and stock muffler and my neighbors hate me. The sound is very raspy and to loud.

I have some options.
1.Rebuild the RPI mid pipe and adding tvo resonators and an x pipe.to break the exhaust pulsations, I am not sure this will work but I could give it a try.

2.Find a muffler that removes the raspy sound and reduce the sound

3. ??

I have searched the forum but didn’t find anything useful, any advice is welcome.

Adding a Remus Sport paired with your current setup should be enough to quiet the exhaust down somewhat. The Remus Sport Exhaust is one of the quietest systems on the market.

They do sound great when paired with X-Pipes though!

tightie · 07-02-2010, 12:45 PM

I'm running the Gintani X pipe with 4 resonators and a akra rear.. it's pretty quiet

GTM_Challenge · 07-02-2010, 03:06 PM

Quote:

Originally Posted by per

I am looking for a cat less exhaust who is as quiet as possible, right know I have the RPI midpipes and stock muffler and my neighbors hate me. The sound is very raspy and to loud.

I have some options.
1.Rebuild the RPI mid pipe and adding tvo resonators and an x pipe.to break the exhaust pulsations, I am not sure this will work but I could give it a try.

2.Find a muffler that removes the raspy sound and reduce the sound

3. ??

I have searched the forum but didn’t find anything useful, any advice is welcome.

The RPI has no resonators or cats, so it will of course by nature, be louder. the other factor that contributes to the sound, and rasp, is that they moved he X section back about 8 inches or so. This has an effect on the sound as well.

I would recomend at least adding a set of good sized resonators to take the volume down. It may also cut down the rasp a tad. If you are looking for a full replacement, many are out there of course if you dont want to hack one up.

MrHarris · 07-06-2010, 08:11 AM

Add resonators and the rasp should tone down/be gone.

CSanto · 07-06-2010, 10:13 AM

not to thread jack, but im kinda in the opposite boat. I have an ES and I want more sound, but I dont want to delete my primary Cats.

I'm wondering what combination of secondary cats/resonators will give me a nice sound under WOT.

///M 4 Life · 08-30-2010, 11:08 AM

if i would add resonators to my x pipe, which kind of resonators are they??

Kwan04 · 08-30-2010, 11:28 AM

So for those running Gintani Catless pipes, are there any concerns with CEL?
I'm coming from an E60 M5 runnning without secondary cats and the sensors were all before the scondary cats and had no problems.
I thought I read on these forums that you would throw a CEL with this setup.
Thanks and sorry if its been posted before.

Bob MG · 08-30-2010, 11:34 AM

I hate noise but this came out beautifully:

http://www.m3post.com/forums/showthread.php?t=424713

Sound same as akra full system, which isn't bad at all and Zero drone

Bob MG · 08-30-2010, 11:37 AM

Quote:

Originally Posted by **********s II

Adding a Remus Sport paired with your current setup should be enough to quiet the exhaust down somewhat. The Remus Sport Exhaust is one of the quietest systems on the market.

They do sound great when paired with X-Pipes though!

Defiantely not!! I had a fabspeed with remus sport and the drone rattled my teeth out!!!!

Plus noise was aggravatingly loud

Kwan04 · 08-30-2010, 12:17 PM

After some searching it seems that
Gintani X-pipe(Catless) with 4 resonators + stock muffler= fairly drone free but CEL
Gintani X-pipe(HFC) + stock mufflers = fairly drone free without CEL

Does everyone agree? Also can you add 2 resonators with the HFC setup?

per · 08-30-2010, 12:49 PM

My setup with X-pipe and 2 resonators stock mufflers, has no drone at all.
It is a little louder than stock, but in a good way

06-13-2010, 11:18 AM	#1
per Lieutenant 47 Rep 507 Posts Drives: M3 E92 Join Date: Jul 2007 Location: Sweden Gothenburg iTrader: (0)	Quiet catless exhaust I am looking for a cat less exhaust who is as quiet as possible, right know I have the RPI midpipes and stock muffler and my neighbors hate me. The sound is very raspy and to loud. I have some options. 1.Rebuild the RPI mid pipe and adding tvo resonators and an x pipe.to break the exhaust pulsations, I am not sure this will work but I could give it a try. 2.Find a muffler that removes the raspy sound and reduce the sound 3. ?? I have searched the forum but didn’t find anything useful, any advice is welcome. __________________ M3 E92 ESS VT-625
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06-13-2010, 12:27 PM	#2
NatAsp-M3 Private 8 Rep 95 Posts Drives: e90 M3 Join Date: Feb 2010 Location: Honolulu iTrader: (0)	I don't know, Per, I kinda think the resonators do more to reduce drone than overall sound. Even HFCs at 100cell seem to make very substantial differences in sound decrease vs straight downpipes. Borla has a quad resonator catless pipe that won't be too much pocket pain if you don't like it. I've only heard that thing on a stock exhaust, but my bet is on any aftermarket muffler it will drastically increase decibels. __________________ e90M3, sold: Akrapovic // Brembo // VRS // Eisenmann // Advan RS // ESS // Challenge
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06-13-2010, 12:29 PM	#3
FStop7 I like cars 329 Rep 5,052 Posts Drives: M6 Join Date: Oct 2008 Location: Newbury Park, CA iTrader: (3)	Cats act as mufflers, by removing thrum the exhaust will be louder. No way around that.
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06-13-2010, 02:23 PM	#4
e.n335 Moderator 270 Rep 4,481 Posts Drives: e93 ///M3 DCT, 07/2009 Join Date: Feb 2007 Location: Switzerland, ZH iTrader: (0)	I'm looking forward to an Evolve X-pipe & Remus street configuration. Second choice for me is the Challenge X-pipe & Remus.
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06-13-2010, 02:35 PM	#5
M3Alpine Lieutenant Colonel 52 Rep 1,512 Posts Drives: M4 AW/SO Join Date: Feb 2006 Location: Central NJ iTrader: (11)	quiet and catless... goodluck __________________ 2002 AW/IR : Sold 2004 AW/BLK : Sold 2009 AW/FR : Sold 2015 AW/SO
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06-15-2010, 02:25 PM	#6
dcgolfdr Wheelsucker 199 Rep 1,280 Posts Drives: Truck Join Date: Oct 2008 Location: Arlington, VA iTrader: (16)	I just installed the Dinan midpipe this past weekend and I would say that it doesn't increase the volume of the exhaust that much. I paired the pipe with the Bastuck rear section, which is pretty quiet, but the increase is not a raspy sound, it is more of a deep sound. Doesn't sound like a mustang but it does sound like it has a V8. When you do hit the gas and get above 5000 rpm the sound does increase as well as the power, but for normal driving I don't think the car is much louder than just the rear section. I will try to get some vids later. Look at the vids of the full dinan setup, the Bastuck is more mild than the dinan rear section.
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06-15-2010, 04:26 PM	#7
DLSJ5 Brigadier General 501 Rep 4,033 Posts Drives: 2016 F82 M4 ZCP Join Date: Dec 2006 Location: CA iTrader: (1)	With the Gintani Catless X-pipe/resonators, combined with the stock exhaust, it is not much louder than stock while cruising, it's only loud when you get on it, exactly how I want it. __________________ 16 F82 M4 DCT - ZCP - JB4 - 556WHP / 570WTQ 08 E92 M3 DCT - Bolt Ons - 60-130MPH 10.71s - 11.88 @ 118MPH - 377WHP ESS VT2-625 SC 60-130MPH 6.80s - 11.30 @ 129.3 MPH 586WHP / 379WTQ ESS VT3-750 - 60-130MPH 6.14s - 10.81 @ 135.13 MPH 690WHP/463WTQ Shift-S3ctor E92 M3 - 1/2 Mile Trap Speed WR - 174.13 MPH
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06-15-2010, 04:34 PM	#8
OMID INC Lieutenant Colonel 92 Rep 1,562 Posts Drives: E70 X5 Join Date: Feb 2010 Location: Chicago iTrader: (6)	remove cats and add resonators. that will quiet it down a little.
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06-23-2010, 10:37 AM	#11
per Lieutenant 47 Rep 507 Posts Drives: M3 E92 Join Date: Jul 2007 Location: Sweden Gothenburg iTrader: (0)	I was not that happy with the sound of the RPI midpipe so this i what i did. A complete rebuild of the midpipe , with a new X-pipe and two new mufflers, the terrible rasp disappeared it is still quite loud under Vot but this is how i want it, Quiet during cruising and normal driving, and aggressive during vot, i am very happy with the result Attached Images __________________ M3 E92 ESS VT-625
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07-02-2010, 12:45 PM	#13
tightie JOSH SHOKRI. 523 Rep 5,881 Posts Drives: 991 GT3RS, 964, Raptor Join Date: Aug 2005 Location: los angeles, california. iTrader: (7) Garage List 2008 BMW M3 [7.90]	I'm running the Gintani X pipe with 4 resonators and a akra rear.. it's pretty quiet __________________ Current: 16 991 GT3RS , 91 964 C2, 17 Raptor \| Past: 2015 991 GT3, 2015 i3,15 YMB F80 M3, 13 E92 M3 DCT, 08 E92 M3 6MT, 07 E60 M5, 02 E46 M3 Instagram: @josh_speeddistrict #SpeedDistrict @SpeedDistrict
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07-06-2010, 08:11 AM	#15
MrHarris yodog 197 Rep 5,026 Posts Drives: '86 Corolla Join Date: Jun 2007 Location: Diamond Bar, Ca iTrader: (5) Garage List 2009 BMW [10.00]	Add resonators and the rasp should tone down/be gone. __________________ 2009 E92 M3 \| Alpine White \| Black Extended \| Advan RS \| Turner Test Pipes \| Dinan Axle-Back \| OETuning \| Eibach Springs \| UUC SSK \| VRS Front Lip \| VRS Type I Diffuser \| Matte Black \| RPi Scoops \| MS Filter \| Yokohama AD08 \| F1 Pinnacle Special Thanks: Gintani \| OETuning \| eAs
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07-06-2010, 10:13 AM	#16
CSanto Brigadier General 636 Rep 3,039 Posts Drives: 2015 BSM/SO M3 Join Date: Feb 2009 Location: New York iTrader: (3)	not to thread jack, but im kinda in the opposite boat. I have an ES and I want more sound, but I dont want to delete my primary Cats. I'm wondering what combination of secondary cats/resonators will give me a nice sound under WOT.
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08-30-2010, 11:08 AM	#17
///M 4 Life Captain 32 Rep 858 Posts Drives: 2014 ///M6 CP Join Date: Oct 2009 Location: Central Jersey iTrader: (0)	if i would add resonators to my x pipe, which kind of resonators are they??
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08-30-2010, 11:28 AM	#18
Kwan04 New Member 0 Rep 7 Posts Drives: 2011 M3 Join Date: Aug 2010 Location: Houston, TX iTrader: (0)	So for those running Gintani Catless pipes, are there any concerns with CEL? I'm coming from an E60 M5 runnning without secondary cats and the sensors were all before the scondary cats and had no problems. I thought I read on these forums that you would throw a CEL with this setup. Thanks and sorry if its been posted before.
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08-30-2010, 11:34 AM	#19
Bob MG Moderating 418 Rep 2,047 Posts Drives: like a muppet Join Date: Oct 2009 Location: Dubai iTrader: (0)	I hate noise but this came out beautifully: http://www.m3post.com/forums/showthread.php?t=424713 Sound same as akra full system, which isn't bad at all and Zero drone
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08-30-2010, 12:17 PM	#21
Kwan04 New Member 0 Rep 7 Posts Drives: 2011 M3 Join Date: Aug 2010 Location: Houston, TX iTrader: (0)	After some searching it seems that Gintani X-pipe(Catless) with 4 resonators + stock muffler= fairly drone free but CEL Gintani X-pipe(HFC) + stock mufflers = fairly drone free without CEL Does everyone agree? Also can you add 2 resonators with the HFC setup?
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08-30-2010, 12:49 PM	#22
per Lieutenant 47 Rep 507 Posts Drives: M3 E92 Join Date: Jul 2007 Location: Sweden Gothenburg iTrader: (0)	My setup with X-pipe and 2 resonators stock mufflers, has no drone at all. It is a little louder than stock, but in a good way __________________ M3 E92 ESS VT-625
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