difference in si and hf mpfi intake manifolds
Thread Starter
Joined: Oct 2002
Posts: 7
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From: birmingham, alabama, united states
difference in si and hf mpfi intake manifolds
is there a difference in the mpfi manifolds in the si and hf. it seems i can get one for the hf for alot cheaper. im wanted to replace the dual point on my 90 honda dx to a multi point. thanks
Honda-Tech Member
Joined: Jul 2002
Posts: 2,250
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From: MI
Re: difference in si and hf mpfi intake manifolds (JdMB16Ahatch)
the hf throttle body is probalby 1/2 the size of the si throttle body
and the manifold looks like a toy.. pretty cute if you ask me
and the manifold looks like a toy.. pretty cute if you ask me
Honda-Tech Member
Joined: Dec 2001
Posts: 2,941
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From: Dirty, Jersey
Re: difference in si and hf mpfi intake manifolds (madeiniraq)
they told you the difference...the HF is tiny and the si one is a lot bigger. i dont know if i would use the word HUGE but its a lot bigger thus more air 
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Joined: Jul 2002
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From: Towson, MD, USA
Re: difference in si and hf mpfi intake manifolds (RaceFacer)
the hf manifold is about an inch and a half in diameter, while the si is about 3", end the extra loot and go with the SI. Hell see if u can fit any other manifolds in there too, mabey a CTR er sumthin.
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Joined: Jun 2002
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From: melbourne, Fl
Re: difference in si and hf mpfi intake manifolds (incubus)
Go here: http://www.car-part.com $25.00 is the cheapest for a SI one!!! Damm, that's a good price! 
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