Secondary Cat Delete

SuperBmw · 04-06-2011, 10:29 PM

I've been looking to get a bit more sound out of my exhaust and I noted that a muffler delete was just way too much for me. I would go catless DP's, but then I'd have issues during emissions testing.

So I was wondering what everyone felt about getting a 2nd cat delete for sound? It's gonna cost me about $135.... is it worth the cost? I searched around and the performance gains seem to be negligible.

I'm just looking for a louder and deeper note to my exhaust without having to go aftermarket.

hipnotic · 04-06-2011, 10:31 PM

i wondered the same thing too, but I believe that secondary cats may also effect emission if your primary cats fail

michaelalex17 · 04-06-2011, 10:31 PM

you dont care about emissions but what about your warranty?

PiZauL · 04-07-2011, 05:29 AM

Here is a thread I created which should help you decide

http://www.e90post.com/forums/showthread.php?t=509180

gaifaun · 04-07-2011, 05:33 AM

more response, faster and more audible turbo spool. increase in 5-10 rwhp, all for $135. whats not to like! oh right, forgot the most important factor. the sound is awesome. it now gurgles and is throatier.

Rotorocious · 04-07-2011, 08:52 AM

Quote:

Originally Posted by SuperBmw

I've been looking to get a bit more sound out of my exhaust and I noted that a muffler delete was just way too much for me. I would go catless DP's, but then I'd have issues during emissions testing.

So I was wondering what everyone felt about getting a 2nd cat delete for sound? It's gonna cost me about $135.... is it worth the cost? I searched around and the performance gains seem to be negligible.

I'm just looking for a louder and deeper note to my exhaust without having to go aftermarket.

Plan on getting some resonators to replace them. It'll sound very raspy without the cats

E92ML · 06-17-2011, 02:50 AM

do it!

neilvosko · 06-10-2012, 10:18 PM

+

gzim335 · 06-10-2012, 10:30 PM

ull see/smell some more smoke too

E90Company · 06-10-2012, 11:11 PM

Are you sure you guys are talking about a second cat delete? It sounds like you guys are talking about what will happen with DPs

Rotorocious · 06-10-2012, 11:28 PM

Quote:

Originally Posted by E90Company

Are you sure you guys are talking about a second cat delete? It sounds like you guys are talking about what will happen with DPs

Yup. It's similar just more noticeable going from catless dp to no secondary cat

Joshboody · 06-10-2012, 11:32 PM

I (no I did NOT) and like the results. Do it

MrRetep · 06-10-2012, 11:35 PM

talk about a zombie thread. This is over a year old

but still useful info.

e90328i · 06-11-2012, 11:52 AM

Lol $135 i got my secondaries cut for 50 with stainless steel your getting ripped off

Vicko · 06-11-2012, 12:05 PM

I have that same setup. You will have a raspy sound right in betwen 1600/1700 to 2000 rpms. You are going to change your driving style 2000rpms and up. I have and 6mt though. Beside that you will like it.

ahwest · 06-26-2012, 11:01 AM

is there an actual performance gain with the secondary cats delete with a tune such as JB3?

Rotorocious · 06-26-2012, 01:15 PM

Yup, nothing really noticable but I'm sure it has to be good for a few hp.

Got mine done for free pretty much. Traded the cats out for the work. Our secondary cats are worth about 80 to the junkers

beemerboy305 · 06-26-2012, 11:35 PM

Check my video/thread. I just ordered res vibrant 2x well c how it sounds

AirborneFF · 08-02-2012, 10:10 AM

Well after asking around a few local shops here in the good ol' state of NC ( by god). I found that it is illegal and also a felony if caught by the EPA if you remove your secondary cats.

Joshboody · 08-02-2012, 10:29 AM

yeah, most states are similar I think. Remove the exhaust first... not on the car different story. And gut them for stealth.

oma3710 · 08-02-2012, 10:59 AM

I did the catless downpipes and 2nd cat delete. The car sounds great.

Metdav070 · 03-27-2018, 11:57 AM

What's guys. Anybody in the Raleigh area with careless dp and 2nd cat delete?
Please

04-06-2011, 10:29 PM	#1
SuperBmw Lieutenant 68 Rep 511 Posts Drives: 07 E92 335i Join Date: Dec 2010 Location: Toronto iTrader: (5)	Secondary Cat Delete I've been looking to get a bit more sound out of my exhaust and I noted that a muffler delete was just way too much for me. I would go catless DP's, but then I'd have issues during emissions testing. So I was wondering what everyone felt about getting a 2nd cat delete for sound? It's gonna cost me about $135.... is it worth the cost? I searched around and the performance gains seem to be negligible. I'm just looking for a louder and deeper note to my exhaust without having to go aftermarket.
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04-06-2011, 10:31 PM	#2
hipnotic Major General 149 Rep 6,604 Posts Drives: e92 335i Join Date: Oct 2007 Location: So. Cal iTrader: (7) Garage List 2008 335i coupe [7.00]	i wondered the same thing too, but I believe that secondary cats may also effect emission if your primary cats fail __________________
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04-06-2011, 10:31 PM	#3
michaelalex17 Brigadier General 596 Rep 3,386 Posts Drives: Manual Wagon Join Date: Aug 2010 Location: CT iTrader: (4)	you dont care about emissions but what about your warranty?
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04-07-2011, 05:29 AM	#4
PiZauL I6 + TT = FTW 78 Rep 845 Posts Drives: AW F80 Join Date: Jan 2010 Location: Baltimore, MD iTrader: (2)	Here is a thread I created which should help you decide http://www.e90post.com/forums/showthread.php?t=509180
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04-07-2011, 05:33 AM	#5
gaifaun Major 206 Rep 1,134 Posts Drives: E90 335i LCI Join Date: Apr 2007 Location: Greater Vancouver iTrader: (14) Garage List 2010 E90 335i LCI [10.00]	more response, faster and more audible turbo spool. increase in 5-10 rwhp, all for $135. whats not to like! oh right, forgot the most important factor. the sound is awesome. it now gurgles and is throatier. __________________ I can help with Coding in Vancouver. PM me
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06-17-2011, 02:50 AM	#7
E92ML Captain 33 Rep 886 Posts Drives: E92 2008 335xi Coupe Join Date: May 2011 Location: Bellevue, WA iTrader: (0)	do it! __________________ Performance: JB4 ECU, CP-E DP's, WW BMS Meth Kit, AR meth elbow, BMS DCI, AFE Intake Scoops, Exterior: Enkruez 19" H8R, H&R Spacers, Aero Lip, Tint, ACS Roof Spoiler, HID AE's, HID Fogs, Black Grills, Sport Pedals
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06-10-2012, 10:18 PM	#8
neilvosko Lieutenant Colonel 89 Rep 1,529 Posts Drives: 335i e92 FBO Join Date: Dec 2011 Location: miami iTrader: (19)	+
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06-10-2012, 10:30 PM	#9
gzim335 Captain 148 Rep 965 Posts Drives: e92 m3 Join Date: Feb 2011 Location: staten island ny iTrader: (4) Garage List 2007/1 e90 335i [2.00]	ull see/smell some more smoke too __________________ e92 m3 dct gintani stage 2+ full ethanol custom pulley and meth kw clubsport,ap racing radical,volk te37sl,akrapovic rear,recaro profi xl,voltphreaks battery
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06-10-2012, 11:11 PM	#10
E90Company Major General 194 Rep 6,136 Posts Drives: Car Join Date: Mar 2012 Location: FL iTrader: (2)	Are you sure you guys are talking about a second cat delete? It sounds like you guys are talking about what will happen with DPs
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06-10-2012, 11:32 PM	#12
Joshboody Lieutenant Colonel 65 Rep 1,708 Posts Drives: pickemuptruck Join Date: Jul 2009 Location: Phoenix, AZ iTrader: (7)	I (no I did NOT) and like the results. Do it Last edited by Joshboody; 08-02-2012 at 10:42 AM..
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06-10-2012, 11:35 PM	#13
MrRetep First Lieutenant 107 Rep 361 Posts Drives: 435i M-Sport Join Date: Jan 2012 Location: Irvine CA iTrader: (3)	talk about a zombie thread. This is over a year old but still useful info.
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06-11-2012, 11:52 AM	#14
e90328i Banned 25 Rep 386 Posts Drives: 07 E90 335i Join Date: May 2011 Location: socal iTrader: (4)	Lol $135 i got my secondaries cut for 50 with stainless steel your getting ripped off
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06-11-2012, 12:05 PM	#15
Vicko Private First Class 3 Rep 183 Posts Drives: 335i coupe 6mt Join Date: Mar 2007 Location: San Juan,PR iTrader: (0)	I have that same setup. You will have a raspy sound right in betwen 1600/1700 to 2000 rpms. You are going to change your driving style 2000rpms and up. I have and 6mt though. Beside that you will like it.
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06-26-2012, 11:01 AM	#16
ahwest Private 8 Rep 92 Posts Drives: E90 LCI Join Date: Dec 2011 Location: San Jose iTrader: (0)	is there an actual performance gain with the secondary cats delete with a tune such as JB3?
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06-26-2012, 01:15 PM	#17
Rotorocious Lieutenant Colonel 103 Rep 1,520 Posts Drives: 335xi Join Date: May 2010 Location: Colorado iTrader: (3)	Yup, nothing really noticable but I'm sure it has to be good for a few hp. Got mine done for free pretty much. Traded the cats out for the work. Our secondary cats are worth about 80 to the junkers
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06-26-2012, 11:35 PM	#18
beemerboy305 Lieutenant 20 Rep 584 Posts Drives: M3 E90 Join Date: Apr 2012 Location: Tampa/Sarasota Fl iTrader: (1)	Check my video/thread. I just ordered res vibrant 2x well c how it sounds __________________ E90///M3 - IB - 6MT - Velgen Wheels - FBO [IMG]http://******************/site/wp-content/uploads/2012/11/logo.png[/IMG]
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08-02-2012, 10:10 AM	#19
AirborneFF Private 14 Rep 81 Posts Drives: 2011 M3 Competition Join Date: Apr 2012 Location: Greensboro nc iTrader: (0)	Well after asking around a few local shops here in the good ol' state of NC ( by god). I found that it is illegal and also a felony if caught by the EPA if you remove your secondary cats. __________________ CF Front lip//Cyba Scoops//K&N filter//Charcoal delete//UPSolute tune//Full LED swap//CF roof spoiler//Monaco blue boot lid//muffler delete//Blacklines//15% tint//Rear fogs//
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08-02-2012, 10:29 AM	#20
Joshboody Lieutenant Colonel 65 Rep 1,708 Posts Drives: pickemuptruck Join Date: Jul 2009 Location: Phoenix, AZ iTrader: (7)	yeah, most states are similar I think. Remove the exhaust first... not on the car different story. And gut them for stealth. Last edited by Joshboody; 08-02-2012 at 10:41 AM..
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08-02-2012, 10:59 AM	#21
oma3710 Major 195 Rep 1,282 Posts Drives: ? Join Date: Apr 2012 Location: Simpsonville, SC iTrader: (1)	I did the catless downpipes and 2nd cat delete. The car sounds great. __________________ __________________ SOLD! X5 35i sdrive- JB4 SOLD! 435i- Cary Jordan E30 Tune~ Dinan Turbo~ BM3 trans tune~ XDI-35~ 3.5 T-map sensor~ VRSF HD FMIC~ VRSF Chargepipe~ VRSF Catless Downpipe~ CTS Intake~ FTP boost pipe~ FTP intake inlet~ FTP oil catch can~ Turbosmart dual bov~
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03-27-2018, 11:57 AM	#22
Metdav070 Registered 0 Rep 2 Posts Drives: 2007 BMW 328i Join Date: Jul 2015 Location: North Carolina iTrader: (0)	What's guys. Anybody in the Raleigh area with careless dp and 2nd cat delete? Please
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