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New header/cat/exhaust question

 
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Old 03-01-2012, 09:08 PM
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New header/cat/exhaust question

So i will be replacing all of these over the next few weeks and want to get a 2.5 inch N1 style cat-back. My question is....with the end of the flex pipe being 2" along with the catalytic converter(Magnaflow 22644) which i believe has a 2 inch inlet and outlet....will a 2.5" direct fit still fit my cat?
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Old 03-02-2012, 12:05 AM
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Re: New header/cat/exhaust question

ok basically what im asking is....do I need to buy everything with the same diameter? I would like to be at 2.5" after the cat...can this work?
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Old 03-02-2012, 12:11 AM
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Re: New header/cat/exhaust question

I think you'll be on, I just used a flange that bolted up
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Old 03-02-2012, 02:16 AM
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Re: New header/cat/exhaust question

It will be fine. My cat is slightly smaller than the axle back i have.
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Old 03-02-2012, 06:10 AM
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Re: New header/cat/exhaust question

it will work but also it depends do you want any performance?

if you do everything should be 60mm/2,5"
if you dont, it doesnt matter

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Originally Posted by Low93Lude View Post
It will be fine. My cat is slightly smaller than the axle back i have.
axle backs doesnt give you anything else than sound
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Old 03-02-2012, 09:29 AM
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Re: New header/cat/exhaust question

really its more about getting a fresh setup so the back of my car doesnt look like a volcano....plus i need to clean out the intake mani and the EGR ports

I would like performance but I have yet to find a header with a 60mm bottom opening or a cat the is 2.5 inlet/outlet......any you know of type T?
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Old 03-02-2012, 09:40 AM
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Re: New header/cat/exhaust question

^ well I have vibrant
Vibrant H22 headers are making a comeback!! - Honda Prelude Forum : Honda Prelude Forums

and catco 2,5" metal cat

+ if you have money try to blacktrax IM? whit it and that exhaust setup you might get some real power (but then you have to do some obd1 conversion for tune)
all depends how much are you willing to spend money

Last edited by TypeT; 03-02-2012 at 09:54 AM.
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Old 03-02-2012, 10:07 AM
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Re: New header/cat/exhaust question

Thanks TypeT....dont have the money for the vibrant header right now but wow it looks sick....also found a direct replacement catco but not sure which 2.5 would fit....think im just gonna go with a cheap set up for now....def dont have the money for an OBDI convert and tune....btw is OBDII just not tunable and thats why everyone goes to OBDI?
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Old 03-02-2012, 10:15 AM
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Re: New header/cat/exhaust question

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Originally Posted by rjschmon View Post
btw is OBDII just not tunable and thats why everyone goes to OBDI?
well you can do something with piggypacks but you can do much more (accurate) tuning with obd1
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Old 03-02-2012, 10:19 AM
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Re: New header/cat/exhaust question

ahh ic well now ive added one more thing on my to-do list lol....thanks for all the info!
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Old 03-02-2012, 10:50 AM
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Re: New header/cat/exhaust question

suggested that do nothing. save money to good setup instead of getting something cheap now and then changing it later all over again.

you just lose money
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Old 03-02-2012, 11:07 AM
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Re: New header/cat/exhaust question

if you want it to be mint. go to autozone, buy a 2" to 2.5" adapter. weld the flanges on, and assuming they are good welds you wont have problems. but you would be fine if you didnt i know people with 3" down pipes to a 2.5" stock catback lol
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Old 03-02-2012, 11:10 AM
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Re: New header/cat/exhaust question

Quote:
Originally Posted by rjschmon View Post
Thanks TypeT....dont have the money for the vibrant header right now but wow it looks sick....also found a direct replacement catco but not sure which 2.5 would fit....think im just gonna go with a cheap set up for now....def dont have the money for an OBDI convert and tune....btw is OBDII just not tunable and thats why everyone goes to OBDI?
OBD2 ecu are programmed to always try and meet emissions standards, not performance. so even if it is tuned, they always try to convert themselves back to stock, which will throw check engine lights and such. but it can be done.. i mean k series are all obd2.. but for your lude just grab a p28 and tune it on crome. you will be mintt
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Old 03-02-2012, 12:50 PM
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Re: New header/cat/exhaust question

Quote:
Originally Posted by TypeT View Post
it will work but also it depends do you want any performance?

if you do everything should be 60mm/2,5"
if you dont, it doesnt matter



axle backs doesnt give you anything else than sound
No the dont but I am running a full exhaust system not just an axle back im just saying my exhaust goes from 2.25" to 2.50"there at the rear and im having no problems.
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Old 03-02-2012, 07:38 PM
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Re: New header/cat/exhaust question

Hmm.. Interesting write up on the vibrant header re-release..
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Old 03-03-2012, 10:05 PM
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Re: New header/cat/exhaust question

If you haven't bought any yet, I have dc sports ceramic headers and flex pipe that I don't need, if your interested let me know.
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Old 03-04-2012, 12:03 AM
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Re: New header/cat/exhaust question

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Originally Posted by BlueTopH23 View Post
If you haven't bought any yet, I have dc sports ceramic headers and flex pipe that I don't need, if your interested let me know.
been there done that
dc = stock

dc is pretty much the same, I mean 4-2 section is better welded together and is weights less... thats about it.. no reason to get dc
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Old 03-04-2012, 01:32 AM
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Re: New header/cat/exhaust question

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