look at how restrictive our secondaries are

capo1m · 06-03-2011, 06:09 AM

car definitely has a power increase better then the 2-3hp i thought thats for sure. a good mod for anybody imo.

Patsfan123 · 06-03-2011, 01:35 PM

Yikes!!

How much louder is the car now?

Can you smell a gasoline odor without the secondaries?

BudVlad · 06-03-2011, 01:48 PM

I replaced secondaries with Supersprint midpipes. No smell and it’s not any louder.

milly · 06-03-2011, 02:09 PM

hmmm interesting.... more low end power or more power throughout the rpms?

fdriller9 · 06-03-2011, 02:44 PM

I was thinking about cutting out my secondaries and just putting in straight pipes from the headers to the resonator.

But if it doesn't change any sound then it's not worth it. I want my 330xi to be a bit louder. Not muffler delete loud, but slightly louder than stock.

Maybe I'll do headers and cut the secondaries out then.

capo1m · 06-03-2011, 04:17 PM

Sounds better not to much louder no smell and adds power throughout rpms

TommyK · 06-03-2011, 05:01 PM

thanks for posting.

johnsonz1122 · 06-03-2011, 05:52 PM

Will u gain much by delet the secondary cat? I heard that primary cat delete is where u see most gain. Not sure how loud will it be if we take out the primary. Can someone chime in and tell us?

tibra1 · 06-03-2011, 06:16 PM

If anyone is interested in brand new hi-flow cats I have set..Magnaflow 200 CEL..

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capo1m · 06-05-2011, 01:04 AM

Quote:

Originally Posted by johnsonz1122

Will u gain much by delet the secondary cat? I heard that primary cat delete is where u see most gain. Not sure how loud will it be if we take out the primary. Can someone chime in and tell us?

The most gain is in primary but I can assure you there is a gain in secondaries a noticeable one and if it's noticeable it's worth it with these cars. I used to beat a 328i by a car length both xi and i both coupes at highways speeds now I'm lookin at 2-2-1/2 car lengths which is alot more then I expected for this

johnsonz1122 · 06-05-2011, 03:54 AM

Quote:

Originally Posted by Capo330i

Quote:

Originally Posted by johnsonz1122

Will u gain much by delet the secondary cat? I heard that primary cat delete is where u see most gain. Not sure how loud will it be if we take out the primary. Can someone chime in and tell us?

The most gain is in primary but I can assure you there is a gain in secondaries a noticeable one and if it's noticeable it's worth it with these cars. I used to beat a 328i by a car length both xi and i both coupes at highways speeds now I'm lookin at 2-2-1/2 car lengths which is alot more then I expected for this

Good to kno this . Other member had done secondary cat delete and they tell me they couldnt tell the difference in performance that's y I am not sure. I guess I will do primary cat delete over secondary. As I wanna keep one of them in place. So my car won't b freaking loud

Shazmonkee · 06-05-2011, 05:17 PM

I wish california allowed primary cat deletes ;(

Dark_Knight_335 · 06-05-2011, 06:49 PM

Quote:

Originally Posted by Shazmonkee

I wish california allowed primary cat deletes ;(

Not many states do, it's pretty much illegal everywhere that I know of...

Ahmad11 · 06-05-2011, 08:00 PM

If I remove the primary cats on a 330i will it loud?

fdriller9 · 06-05-2011, 08:26 PM

Quote:

Originally Posted by Ahmad11

If I remove the primary cats on a 330i will it loud?

Primary cats are built into the headers....yes it will be loud. You would probably want to keep the oem muffler....and resonator.

It's a great gain....I've heard up to 15hp. But unless you get supersprint headers (about 2K I beleive), it won't be a direct bolt on with the obx headers. (~$350)

capo1m · 06-05-2011, 08:40 PM

throw in a new o2 sim and no one will ever know u took dem out ahha its next on the list if i cant sell my car and then supercharger

Ahmad11 · 06-05-2011, 09:03 PM

Quote:

Originally Posted by Capo330i

throw in a new o2 sim and no one will ever know u took dem out ahha its next on the list if i cant sell my car and
then supercharger

What's an o2 sim?!?!?? How much are they?!

Mr.E92 · 06-05-2011, 09:07 PM

Ayy Capo....any videos of how this sounds?

Dr. Nate · 06-05-2011, 09:24 PM

Quote:

Originally Posted by Ahmad11

What's an o2 sim?!?!?? How much are they?!

It simulates the presence of an oxygen sensor. A company called Casper Electronics use to be the largest producer of them and was actually shut down by the EPA when they sued them in Federal Court.

-Nate

capo1m · 06-06-2011, 09:47 PM

Quote:

Originally Posted by Jayxx19

Ayy Capo....any videos of how this sounds?

no because its really just a little grembler adds a lot more spit back and gives some now added sound butt you wont notice in the video to much because video disorts it and i would take a video for you but i lost my camer

no good but i assure you its the sound 90% of the guys on here are looking for

avengeme · 06-09-2011, 02:04 PM

Do the secondary cats have o2 sensors on them? Will removing it cause me to fail emissions?

fdriller9 · 06-09-2011, 02:30 PM

Quote:

Originally Posted by avengeme

Do the secondary cats have o2 sensors on them? Will removing it cause me to fail emissions?

I don't think so but you may fail visual inspection.

06-03-2011, 06:09 AM	#1
capo1m Colonel 89 Rep 2,030 Posts Drives: 1M, M4 Join Date: Nov 2009 Location: Middletown,Ny iTrader: (17)	look at how restrictive our secondaries are car definitely has a power increase better then the 2-3hp i thought thats for sure. a good mod for anybody imo. __________________ AW E82 1M MW F82 M4
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06-03-2011, 01:35 PM	#2
Patsfan123 First Lieutenant 14 Rep 328 Posts Drives: 2007 328xi Coupe Join Date: Apr 2009 Location: Quincy, MA iTrader: (0)	Yikes!! How much louder is the car now? Can you smell a gasoline odor without the secondaries? __________________ 2007 328xi Coupe \| TiAg \| Steptronic \| Premium \| Sport \| Nav \| Comfort \| Cold Weather \| BMW Sport Exhaust \| BMS PBX \| Euro Airbox w/ K&N \| Eibach/Bilstein \| RDash LED License Plate
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06-03-2011, 01:48 PM	#3
BudVlad Old Geezer 360 Rep 1,193 Posts Drives: 08 E92 N53B30 Join Date: Jul 2007 Location: Budweis iTrader: (0) Garage List 2008 E92 N53B30 [10.00]	I replaced secondaries with Supersprint midpipes. No smell and it’s not any louder. __________________
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06-03-2011, 02:09 PM	#4
milly Captain 82 Rep 783 Posts Drives: 328i Join Date: Dec 2010 Location: Charleston, SC iTrader: (3) Garage List 2008 328i (e90) [9.00]	hmmm interesting.... more low end power or more power throughout the rpms? __________________ Black 2008 328i e90-BMW Performance CF Strut Bar/Muffler delete/8000k Fogs Fogs/Trunk Spoiler/5% Tint/BlueTooth/JVC HU/AG M359 Wheels/Matte Black kidney grills/H&R Race Springs/Koni Yellows/Orion V2 Angel Eyes/EuroCharged Tune/
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06-03-2011, 02:44 PM	#5
fdriller9 Banned 253 Rep 7,089 Posts Drives: '06 AW 330xi Join Date: Mar 2009 Location: North Jersey/Philly/NYC iTrader: (4) Garage List 2006 330xi [6.44]	I was thinking about cutting out my secondaries and just putting in straight pipes from the headers to the resonator. But if it doesn't change any sound then it's not worth it. I want my 330xi to be a bit louder. Not muffler delete loud, but slightly louder than stock. Maybe I'll do headers and cut the secondaries out then.
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06-03-2011, 04:17 PM	#6
capo1m Colonel 89 Rep 2,030 Posts Drives: 1M, M4 Join Date: Nov 2009 Location: Middletown,Ny iTrader: (17)	Sounds better not to much louder no smell and adds power throughout rpms __________________ AW E82 1M MW F82 M4
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06-03-2011, 05:01 PM	#7
TommyK Brigadier General 119 Rep 3,325 Posts Drives: E90 335i LCI Join Date: Aug 2008 Location: Orange County, CA iTrader: (9) Garage List 2009 BMW 335i LCI [0.00] 2006 E90 330i [0.00]	thanks for posting.
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06-03-2011, 05:52 PM	#8
johnsonz1122 First Lieutenant 19 Rep 347 Posts Drives: f30 335xi Join Date: Oct 2009 Location: vancouver iTrader: (3)	Will u gain much by delet the secondary cat? I heard that primary cat delete is where u see most gain. Not sure how loud will it be if we take out the primary. Can someone chime in and tell us? __________________ 13' F30 335xi mods are on their way 09' E90 LCI 328xi (GONE, BUT NOT FORGOTTEN) 19" m310,quad conversion perf exhaust, full mtech conversion, m3 sides, kwv1,etc PICS:http://www.e90post.com/forums/showthread.php?t=757811 PM me if you need coding for f30s in GVR
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06-03-2011, 06:16 PM	#9
tibra1 Banned 127 Rep 6,773 Posts Drives: 2011 ZCP M3 - 2007 335i crashd Join Date: Apr 2009 Location: NYC iTrader: (4)	If anyone is interested in brand new hi-flow cats I have set..Magnaflow 200 CEL..
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06-05-2011, 05:17 PM	#12
Shazmonkee 110 Rep 2,455 Posts Drives: BMW E92 Join Date: Feb 2007 Location: United States iTrader: (11) Garage List 2007 BMW 328i E92 C ... [0.00]	I wish california allowed primary cat deletes ;(
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06-05-2011, 08:00 PM	#14
Ahmad11 First Lieutenant 36 Rep 348 Posts Drives: 2006 BMW 330i, cosmetic mods Join Date: Mar 2011 Location: Tulsa, Oklahoma iTrader: (0)	If I remove the primary cats on a 330i will it loud?
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06-05-2011, 08:40 PM	#16
capo1m Colonel 89 Rep 2,030 Posts Drives: 1M, M4 Join Date: Nov 2009 Location: Middletown,Ny iTrader: (17)	throw in a new o2 sim and no one will ever know u took dem out ahha its next on the list if i cant sell my car and then supercharger __________________ AW E82 1M MW F82 M4
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06-05-2011, 09:07 PM	#18
Mr.E92 Captain 33 Rep 680 Posts Drives: 2012 328i E92 Join Date: Nov 2010 Location: Orlando/Fort Walton Beach Florida iTrader: (6) Garage List 2012 328i Coupe [0.00]	Ayy Capo....any videos of how this sounds?
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06-09-2011, 02:04 PM	#21
avengeme Private 6 Rep 81 Posts Drives: BMW 328i Join Date: May 2011 Location: Baltimore, MD iTrader: (0)	Do the secondary cats have o2 sensors on them? Will removing it cause me to fail emissions?
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