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99 civic with gsr swap itr header question

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Old Jun 20, 2009 | 02:53 PM
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blackccoupe's Avatar
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Default 99 civic with gsr swap itr header question

got a gsr swap in my 99 civic coupe what cat will fit with the itr header and my aftermarket exhaust i have now, like a bolt up one, if anyone knows please let me know
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Old Jun 20, 2009 | 07:37 PM
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00Red_SiR's Avatar
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Default Re: 99 civic with gsr swap itr header question

A stock ITR cat should bolt up, other than that you'll need one that's 17" long.
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Old Jun 20, 2009 | 08:40 PM
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Default Re: 99 civic with gsr swap itr header question

thanks man so 17" should bolt up right ?
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Old Jun 20, 2009 | 08:49 PM
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Default Re: 99 civic with gsr swap itr header question

Unless you have emissions, just get a custom straight pipe. Have one on mine mating a JDM ITR header and OEM US R exhaust...quiet as can be. :-)
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Old Jun 21, 2009 | 07:25 AM
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Default Re: 99 civic with gsr swap itr header question

Originally Posted by blackccoupe
thanks man so 17" should bolt up right ?
That's what it was on my EM1 so it should be the same on yours. If there's any doubt you can temporarily bolt the header on and install the b-pipe and measure the distance between them. It should be 17".
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Old Jun 22, 2009 | 04:03 PM
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Default Re: 99 civic with gsr swap itr header question

MagnaFlow Direct-Fit Catalytic Converters part #22630. but only if you live outside of California. they will not sale it to anyone in California.
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