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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 05-06-2008, 01:40 PM   #21
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thanks for the info man!
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Old 05-06-2008, 02:47 PM   #22
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Old 05-06-2008, 03:03 PM   #23
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yes it is a pretty good and concise write-up.

there are also the "shorty" headers not posted

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For the emmisions test...get a bottle of Guaranteed to Pass. 1st try i didn't pass, a friend told me about it so i tried it and i passed the next day.
it's the visual he's talking about failing.

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Wonderful thread. Sticky this!!!
doubtful it would get a sticky since it's illegal to run without cats and remove the gov't emission control system on the street. promoting a "how to" that is illegal in this day and age where we are suppose to be "green" might get the site hassled?
i know in CA the CHP has done checkpoints for roadside inspections. if you get caught you're in a load of sheit. maybe the fines and negatives of getting caught should be listed too for the noobs.
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Old 05-06-2008, 03:08 PM   #24
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Well, I wasn't encouraging getting away with it in the states that do have emission control. I was actually suggesting they go and get racing cats so that their cars can be legal on the road.
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Old 05-06-2008, 03:46 PM   #25
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Well, I wasn't encouraging getting away with it in the states that do have emission control. I was actually suggesting they go and get racing cats so that their cars can be legal on the road.
I think it's worth noting for California board members, running headers that are not C.A.R.B (California Air Resource Board) approved are illegal whether you run cats or not. This is according to California Vehicle Code 27156

http://www.arb.ca.gov/bluebook/bb99/VC/27156.htm

C.A.R.B. Approved headers are exempt from this (I know of no approved headers for our cars) Dinan produced an approved header for the 2000-2003 4.9L M5 and Z8 but thats all I could find here:

http://www.arb.ca.gov/msprog/aftermk...rmktdevice.php

Personally I think this is stupid if you can pass the tailpipe sniffer you should be allowed to modify it. The only way around it here is to find someone willing to 'help' you pass or swap your old manifolds back on every two years for the test. I haven't been able to find the penalties for the offense yet but there is a provision that says if you are found guilty of 'willfully' breaking the law the court is to impose the maximum fine. I'll see if I can find what that is.


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Old 05-06-2008, 03:47 PM   #26
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Great information TheBirdmanJD!
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Old 05-06-2008, 03:51 PM   #27
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I understand what you were trying to say Alex. You're always informative, no worries.
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Old 05-06-2008, 04:04 PM   #28
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good job Ken. now if there was only a way to make everyone read this...
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Old 05-06-2008, 04:06 PM   #29
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answers a lot of questions, definitely should be a sticky

i'm interested in knowing how much those of you who paid for a mechanic ended up spending for the labor?
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Old 05-06-2008, 04:26 PM   #30
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Old 05-06-2008, 04:39 PM   #31
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what race cats should i be looking at if i buy ebay headers?
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Old 05-06-2008, 04:41 PM   #32
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PM AdamBath, he made a suggestion in a thread, I forgot.
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Old 05-06-2008, 04:45 PM   #33
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what race cats should i be looking at if i buy ebay headers?
hottexhaust.com and vibrant.com both sell cats you can use for this project. if im not mistaken they will need to be 2.25 or 2.5 inches to fit. you are probably going to want 300 cell although im not sure whether they should metal or ceramic core(i think metallic).

good luck
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Old 05-06-2008, 04:50 PM   #34
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Old 05-06-2008, 04:51 PM   #35
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Originally Posted by kcalhoun27 View Post
hottexhaust.com and vibrant.com both sell cats you can use for this project. if im not mistaken they will need to be 2.25 or 2.5 inches to fit. you are probably going to want 300 cell although im not sure whether they should metal or ceramic core(i think metallic).

good luck
if you plan to go forced induction then metal core is what you want. if you don't, get ceramic. the metal core is 300 cell, the ceramic is 400, at least on the 2 sites i've seen or personally recommended.

if you want ceramic, vibrant has the best price. if you want metal core, http://www.hottexhaust.com/search_re...ottexhaust.com
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Old 05-06-2008, 04:54 PM   #36
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Thanks for putting in your 2 cents Adam,
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Old 05-06-2008, 04:54 PM   #37
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Go Ken Go!

Racing cats will dampen the sound a little bit, correct?
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Old 05-06-2008, 04:56 PM   #38
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Go Ken Go!

Racing cats will dampen the sound a little bit, correct?
Yes.
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Old 05-06-2008, 04:56 PM   #39
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Thanks for putting in your 2 cents Adam,
np, this is a great idea for a thread, its kind of a redux of the thread in my sig, i think i'll put this one in it instead
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Old 05-06-2008, 04:58 PM   #40
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Great Thread Ken
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