header flange and cat flange questions
 

I just recently picked up a hatch with a gsr swap. It has a FGK header and collector. The collect is 2.5 i believe and the cat is only 2.25. So of course they aren't fitting, my question is can i just buy a flange and have it welded to the cat or will that not even work since the cat is only 2.25?

Re: header flange and cat flange questions (MySelfAffliction)
 

but the flanges line up,right? and does the header come with the metal o ring as in the pic shown below..or it came with thin metal gasket




Modified by crazyguy at 10:16 AM 9/29/2007

Re: header flange and cat flange questions (crazyguy)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crazyguy &raquo;</TD></TR><TR><TD CLASS="quote">but the flanges line up,right? and does the header come with the metal o ring as in the pic shown below..or it came with thin metal gasket

https://images.channeladvisor.com/Se...-HC8800D16.jpg</TD></TR></TABLE>


No the flanges do not line up, the cat side is too small. And yes it came with the donut gasket on the collector side.

Re: header flange and cat flange questions (MySelfAffliction)
 

ok..it if does not line up..u need to bring it to a muffler shop to have them cut and welded for u..thats what i did.

Re: header flange and cat flange questions (crazyguy)
 

Yea the last shop i went to last weekend..didn't have any flanges laying around. So i guess i'll try going to another shop. Should i have them put a bigger flange on the cat side or a smaller flange on the collector side?

Re: header flange and cat flange questions (MySelfAffliction)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MySelfAffliction &raquo;</TD></TR><TR><TD CLASS="quote">Yea the last shop i went to last weekend..didn't have any flanges laying around. So i guess i'll try going to another shop. Should i have them put a bigger flange on the cat side or a smaller flange on the collector side?</TD></TR></TABLE>

I would definitely get the bigger flange on the cat so you don't bottleneck the header.

Re: header flange and cat flange questions (8krdline)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 8krdline &raquo;</TD></TR><TR><TD CLASS="quote">

I would definitely get the bigger flange on the cat so you don't bottleneck the header.</TD></TR></TABLE>

cool that's what i needed to know. Thanks https://honda-tech.com/forums/images/smilies/emthup.gif