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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, 05:31 PM   #41
MJRMatt330
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thanks for the help everybody, its greatly appreciated... i plan on doing ebay headers w/ a race cat in a month or so which will kick off my summer performance modding spree (headers, diff, software). Cant wait What size cat must i buy? 2.25"?
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Old 05-06-2008, 07:37 PM   #42
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Yes. I believe 2.25" is correct.
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Old 05-06-2008, 08:10 PM   #43
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Originally Posted by MJRMatt330 View Post
thanks for the help everybody, its greatly appreciated... i plan on doing ebay headers w/ a race cat in a month or so which will kick off my summer performance modding spree (headers, diff, software). Cant wait What size cat must i buy? 2.25"?
Dont do a race cat it is an extreme waste of money. You wil not notice a difference between race cats and normal cats. The whole concept of race cats is retarted how many race cars do you know that have cats. Good choice though with the ebay headers you will love them.

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Old 05-06-2008, 08:14 PM   #44
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you should add the cat info to the first post, as well as the main ebay sellers

like this

deluboz(generally most expensive)

gmotogarage(most likely to give you the right header)

trader-nas

boombop(feeling lucky? might get the wrong ones)


and seriously, this needs to be stickied, period.
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Old 05-06-2008, 08:51 PM   #45
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Maybe with a little disclaimer added to the original post stating that the forums themselves do not condone illegal activities, blah blah blah...

I really must say this thread cleared lots of things up for me, and if more people can see it, then great!
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Old 05-06-2008, 09:20 PM   #46
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I'm working on my headers as of right now.

Great write up Ken
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Old 05-06-2008, 09:36 PM   #47
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Dont do a race cat it is an extreme waste of money. You wil not notice a difference between race cats and normal cats. The whole concept of race cats is retarted how many race cars do you know that have cats. Good choice though with the ebay headers you will love them.
well i need to do cats, so what exactly are you saying... stick with no cats or stay away from "race" cats and get a "normal" cat? Arent the ones someone linked only 115 dollars or something?
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Old 05-06-2008, 10:48 PM   #48
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Geewhizzz Ken is there anything else i should know??





lol j/k nice writeup, vote for sticky
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Old 05-06-2008, 10:50 PM   #49
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great post
I think any future threads asking questions already answered in this post should be locked
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Old 05-06-2008, 10:52 PM   #50
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Geewhizzz Ken is there anything else i should know??





lol j/k nice writeup, vote for sticky
Butters = AWESOME
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Old 05-06-2008, 11:24 PM   #51
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well i need to do cats, so what exactly are you saying... stick with no cats or stay away from "race" cats and get a "normal" cat? Arent the ones someone linked only 115 dollars or something?
Why do you need to get cats? As already stated, cats or no cats, getting the headers makes your car illegal in CA. The only reason to get cats is to cut down on noise.
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Old 05-06-2008, 11:38 PM   #52
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nice write up ken. i am looking at headers too soon
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Old 05-07-2008, 12:21 AM   #53
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As already stated, cats or no cats, getting the headers makes your car illegal in CA. The only reason to get cats is to cut down on noise.
Yeah...that and you might still care about the emissions your car puts out.
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Old 05-07-2008, 03:17 AM   #54
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Why do you need to get cats? As already stated, cats or no cats, getting the headers makes your car illegal in CA. The only reason to get cats is to cut down on noise.
i would like to cut down on noise along with keeping emissions halfway decent too. (dont want the godawful smell) How do i pass an emissions test then in CA if i get headers? (w/o bribing )
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Old 05-07-2008, 03:19 AM   #55
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i would like to cut down on noise along with keeping emissions halfway decent too. (dont want the godawful smell) How do i pass an emissions test then in CA if i get headers? (w/o bribing )
Sweet-talking
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Old 05-07-2008, 03:28 AM   #56
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Sweet-talking


is that really the only way to get away with it?
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Old 05-07-2008, 03:33 AM   #57
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is that really the only way to get away with it?
Yup... you'll fail the visual, you'll fail the diagnostics and you may even still fail emissions without a fairly restrictive cat (which would defeat the purpose of getting the headers.) So yeah, you'll need to give a reason for the guy to push "yes" on that computer screen, lol.

My last Smog check guy was questioning my intake and said I can't pass with it but was nice enough to let me off the hook (after him dicking me around for a little bit and later asking if I worked for the government ) Although I felt that he was just tired since it was the end of the day, so you can try that tactic as well
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Old 05-07-2008, 03:42 AM   #58
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Yup... you'll fail the visual, you'll fail the diagnostics and you may even still fail emissions without a fairly restrictive cat (which would defeat the purpose of getting the headers.) So yeah, you'll need to give a reason for the guy to push "yes" on that computer screen, lol.

My last Smog check guy was questioning my intake and said I can't pass with it but was nice enough to let me off the hook (after him dicking me around for a little bit and later asking if I worked for the government ) Although I felt that he was just tired since it was the end of the day, so you can try that tactic as well
sh1t. that really sucks... damn CA, why do they have to be so strict... anyway, thanks for the info and i still think im gunna do the headers
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Old 05-07-2008, 06:24 AM   #59
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Why do you need to get cats? As already stated, cats or no cats, getting the headers makes your car illegal in CA. The only reason to get cats is to cut down on noise.
Sadly we're not all in CA. Here in the UK you can use pretty much whatever exhaust system you like, but it's got to pass gas emissions analysis during annual MOT test (there are also roadside spot checks here too) which the OEM cats will. What components you use for the rest of your system, headers, cat-back system, is up to you, although you must have some kind of muffler / silencer, although fairly loud ones are allowed.
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Old 05-07-2008, 10:47 AM   #60
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No sticky yet huh? lol.
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