Fully catless vs primary cat delete

BLKSWAN · 08-28-2011, 02:20 PM

Just wondering how much louder the m3 is with all cats removed compared to primary cat delete only. Reason I ask is I\'m trying to decide on whether or not to go challenge race or challenge sport. Thanks in advance for the input.

wwjd15 · 08-28-2011, 02:23 PM

It depends on your rear exhaust. If running catless with some loud rear session, it will be crazy loud and raspy.

BLKSWAN · 08-28-2011, 04:29 PM

If running meistershaft gt as the rear section I'm wondering how much louder it will be.

Len_Beach · 08-28-2011, 05:14 PM

What about modded stock rear?

CCLSVTM3 · 08-28-2011, 06:41 PM

Is there an issue of loss of TQ going full catless????

xchosun1x · 08-28-2011, 07:17 PM

i'd recommend a akra rear section with any full catless or resonated X pipe

good for the street and awesome when you get on it

1MOREMOD · 08-28-2011, 07:26 PM

im debating myself what rear section to use with my challenge sport center section or just leave as is myself.

Dave07997S · 08-28-2011, 09:04 PM

You will want to keep some set of resonators, going catless won't be an issue. Look at what Borla does along with Dinan, they remove all the cats but have 4 resonators.

Dave

e92Mjunky · 08-28-2011, 10:26 PM

I was thinking of throwing in some 200 cell high flow cats on my car, then have ESS do a nice 93 octane tune...would also be curious how loud it would be

REDBULL · 08-28-2011, 10:42 PM

my friend had cat less with meisterschaft if u need a sound clip let me know. also i am selling my cat less rpi x pipe. pretty much the same as the challenge race, but you'll get a good price

BLKSWAN · 08-29-2011, 08:06 AM

I'm wondering how much louder the sound will be with the Challenge Race (which has 2 resonators) vs the Sport (which has 2 resonators and 200 cell cats). My friend has Challenge Sport with Meistershaft GT now and it sounds great and I'm trying to decide if going Race will be too loud compared to the sport. If there is not much sound difference, I think I want to go Race.

Bx Tpr · 08-29-2011, 08:12 AM

Catless with a borla xpipe (no cats & 4 resonators) and corsa muffler section and I have absolutely zero drone. I can have a convo in the car at 60mph in 6th gear with ease. WOT is a different story =)

08-28-2011, 02:20 PM	#1
BLKSWAN Private 2 Rep 63 Posts Drives: E92 M3 (On Order) Join Date: Jun 2011 Location: New Orleans, LA iTrader: (0)	Fully catless vs primary cat delete Just wondering how much louder the m3 is with all cats removed compared to primary cat delete only. Reason I ask is I\'m trying to decide on whether or not to go challenge race or challenge sport. Thanks in advance for the input.
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08-28-2011, 02:23 PM	#2
wwjd15 Banned 89 Rep 1,315 Posts Drives: 11 E92 M3 MR Join Date: May 2009 Location: Orange County iTrader: (6)	It depends on your rear exhaust. If running catless with some loud rear session, it will be crazy loud and raspy.
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08-28-2011, 04:29 PM	#3
BLKSWAN Private 2 Rep 63 Posts Drives: E92 M3 (On Order) Join Date: Jun 2011 Location: New Orleans, LA iTrader: (0)	If running meistershaft gt as the rear section I'm wondering how much louder it will be.
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08-28-2011, 05:14 PM	#4
Len_Beach Major 186 Rep 1,247 Posts Drives: 435d Join Date: Jun 2011 Location: UK iTrader: (1)	What about modded stock rear?
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08-28-2011, 06:41 PM	#5
CCLSVTM3 Lieutenant 36 Rep 523 Posts Drives: Interlagos blue E90 M3 Join Date: Jul 2011 Location: Burbank, CA iTrader: (1)	Is there an issue of loss of TQ going full catless???? __________________ BMC filter, OEM Exh Mod, ESS Direct Flash tune, flat black kidney grills, color painted front reflectors, LUX Angel eyes, -2012 SVT Raptor 4 dr -09 E90 M3
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08-28-2011, 07:17 PM	#6
xchosun1x Track Duty 266 Rep 2,467 Posts Drives: Track build 08 E92 M3 DCT Join Date: Nov 2009 Location: Los Angeles iTrader: (14)	i'd recommend a akra rear section with any full catless or resonated X pipe good for the street and awesome when you get on it
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08-28-2011, 07:26 PM	#7
1MOREMOD - 11817 Rep 23,187 Posts Drives: Race car-> Join Date: Mar 2009 Location: check your mirrors iTrader: (5)	im debating myself what rear section to use with my challenge sport center section or just leave as is myself. __________________ 02 Tiag e46 M3\|6MT\|GC plates\|MCS c.o.\|GC bars\|GC race control arms\|GC bushings\|BW eng. & tran. mounts\|subframe kit\|BW race shifter\|BW Jaffster\|Euro header\|BW exhaust\|K&N c.a.i.\|Epic race tune\|Rouge pulleys\|Seibon CF hood\|CSL bumper\|apr gt 250 & splitter\|ST-40\|XR-2\|SS lines\|half cage\|Recaro profi\|Profi 2 harness\|BMWpedals\|BW studs\|
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08-28-2011, 09:04 PM	#8
Dave07997S Brigadier General 721 Rep 3,964 Posts Drives: 2020 Ford Mustang GT Join Date: May 2009 Location: El Segundo, CA iTrader: (1)	You will want to keep some set of resonators, going catless won't be an issue. Look at what Borla does along with Dinan, they remove all the cats but have 4 resonators. Dave __________________ 2020 Ford Mustang GT 6MT PP1 444rwhp (Sold)2013 M3 Coupe-MR/BLK ZCP, 2011 M3 Coupe-MR/Blk 2007 Porsche 997C2S Speed Yellow/Blk sport seats 2004 BMW M3 Imola/Blk
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08-28-2011, 10:26 PM	#9
e92Mjunky First Lieutenant 111 Rep 395 Posts Drives: E46 M3 S65 swap Join Date: Mar 2011 Location: Austin, TX iTrader: (0)	I was thinking of throwing in some 200 cell high flow cats on my car, then have ESS do a nice 93 octane tune...would also be curious how loud it would be __________________ E46 M3 S65 swap
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08-28-2011, 10:42 PM	#10
REDBULL Captain 75 Rep 731 Posts Drives: '12 SG M3/Fox Red Join Date: Feb 2010 Location: NA iTrader: (6)	my friend had cat less with meisterschaft if u need a sound clip let me know. also i am selling my cat less rpi x pipe. pretty much the same as the challenge race, but you'll get a good price __________________ 12 E92 M3 SG/Fox Red - ESS VT2-650 \| Mode Carbon \| KW Clubsports \| IPE \| Challenge Race X pipe 10 E92 M3 MR/Black - rod bearing failure
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08-29-2011, 08:06 AM	#11
BLKSWAN Private 2 Rep 63 Posts Drives: E92 M3 (On Order) Join Date: Jun 2011 Location: New Orleans, LA iTrader: (0)	I'm wondering how much louder the sound will be with the Challenge Race (which has 2 resonators) vs the Sport (which has 2 resonators and 200 cell cats). My friend has Challenge Sport with Meistershaft GT now and it sounds great and I'm trying to decide if going Race will be too loud compared to the sport. If there is not much sound difference, I think I want to go Race.
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08-29-2011, 08:12 AM	#12
Bx Tpr Captain 123 Rep 891 Posts Drives: 23 CSL Join Date: Feb 2009 Location: NY iTrader: (8)	Catless with a borla xpipe (no cats & 4 resonators) and corsa muffler section and I have absolutely zero drone. I can have a convo in the car at 60mph in 6th gear with ease. WOT is a different story =)
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