Will 90 Si exhaust manifold work with HF motor?
04-30-2004, 12:13 AM
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Will 90 Si exhaust manifold work with HF motor?
My friend has been looking to replace his cat on his 90 Crx Hf, the problem is that he has not been able to find an aftermarket replacement cat for his car.
He cannot afford to buy the OEM version since it is so expensive.
My question to anyone who can help... Is it possible to use an exhaust manifold from an Si motor and also use an Si catalytic convertor?
Or does anyone know of an aftermarket cat for the HF?
Before I get flamed.. Yes I searched for an answer and this is a California crx
Mig
He cannot afford to buy the OEM version since it is so expensive.
My question to anyone who can help... Is it possible to use an exhaust manifold from an Si motor and also use an Si catalytic convertor?
Or does anyone know of an aftermarket cat for the HF?
Before I get flamed.. Yes I searched for an answer and this is a California crx
Mig
04-30-2004, 02:43 AM
#2
Re: Will 90 Si exhaust manifold work with HF motor? (Silver_Rex)
it will all bolt up. not sure if it will pass emissions, as i've never had to deal with that. but i don't see any reason it woudln't unless they have pictures to go by for what its supposed to look like.
04-30-2004, 09:33 AM
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Re: Will 90 Si exhaust manifold work with HF motor? (civicwagonman)
Im pretty sure too it would bolt up. My only concern is will it run with this setup and pass smog also..
Mig
Mig
05-01-2004, 03:31 AM
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Re: Will 90 Si exhaust manifold work with HF motor? (Silver_Rex)
mine is 89 civic hatch standard, I also have cat on the downpipe.
if you decided to use si exhaust manifold (header), it will work (bolt on)
but to mount si cat, you need to cut & weld it to your mid pipe.
if you just need to install si manifold. it will all bolt up directly to your mid pipe,
which would skip the cat.
if you decided to use si exhaust manifold (header), it will work (bolt on)
but to mount si cat, you need to cut & weld it to your mid pipe.
if you just need to install si manifold. it will all bolt up directly to your mid pipe,
which would skip the cat.
05-01-2004, 06:23 AM
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Re: Will 90 Si exhaust manifold work with HF motor? (B1TEM3)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B1TEM3 »</TD></TR><TR><TD CLASS="quote">mine is 89 civic hatch standard, I also have cat on the downpipe.
if you decided to use si exhaust manifold (header), it will work (bolt on)
but to mount si cat, you need to cut & weld it to your mid pipe.
if you just need to install si manifold. it will all bolt up directly to your mid pipe,
which would skip the cat.</TD></TR></TABLE>
I'm still running my CRX HF's stock exhaust. My gas mileage and power were disappearing so I dropped my JDM D15B's header and a Z6 Down pipe to the HF mid-pipe; cutting out the use of a cat. I've got all my power and gas mileage back. The HF cat has over 244K miles on it... I think that it's beyond it's years
So I'm looking locally for a DX/Si Midpipe, or will have my HF's modified so I can put a cat on. (Need to be legal 
)
if you decided to use si exhaust manifold (header), it will work (bolt on)
but to mount si cat, you need to cut & weld it to your mid pipe.
if you just need to install si manifold. it will all bolt up directly to your mid pipe,
which would skip the cat.</TD></TR></TABLE>
I'm still running my CRX HF's stock exhaust. My gas mileage and power were disappearing so I dropped my JDM D15B's header and a Z6 Down pipe to the HF mid-pipe; cutting out the use of a cat. I've got all my power and gas mileage back. The HF cat has over 244K miles on it... I think that it's beyond it's years
So I'm looking locally for a DX/Si Midpipe, or will have my HF's modified so I can put a cat on. (Need to be legal )
05-01-2004, 10:03 PM
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Re: Will 90 Si exhaust manifold work with HF motor? (B1TEM3)
Yeah I kinda of figured that was going to be his only option (cutting and welding).. My concern was more for performance issues if I used the si manifold and cat..
Thanks for the info thou..
Mig
Thanks for the info thou..
Mig
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