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Old 03-02-2011, 03:06 AM   #1
drummerwill
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H23 Performance intake mani?

ran into an old high school buddy earlier today, who was still rocking his H23 prelude. He showed me his new OBX intake mani, same as in the link. It got me to thinking since we can swap our intake mani's to H23 ones could we just swap to a performance H23 intake mani like below or would that be too much for the engine? I dont have much knowledge on intake manifolds and I wasnt sure if there would be a negative effect, like having the exhaust being too large?

I was going to do an OEM H23 plenum/A6 runner swap to my A1 this spring after i get the car painted, but since having priced used parts out i think it would be less expensive and more beneficial to do this in the long run, if it would work. (~$150 ebay)

http://www.obxracingsports.com/products.php?pk=1304
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Old 03-02-2011, 08:00 AM   #2
gloryaccordy
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It's a terrible design

Has he tuned for it? Put it on a dyno? Go w/the stock H23 setup.
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Old 03-02-2011, 08:05 AM   #3
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I bought my H23 manifold for $50 on ebay, complete. Much cheaper than $150 for an unproven design
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Old 03-02-2011, 09:16 AM   #4
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OBX is a crap knockoff company... They don't do any real R&D for their products. I believe their intake manifold is a knockoff of the Venom H22 manifold.

You could probably use it, though there might be firewall clearance. I'd stick with the OEM manifold, though. Unless your engine has a LOT done to it, you won't really see any benefits from anything "better" anyway. An engine can only breathe as well as its biggest bottleneck allows.
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Old 03-02-2011, 01:42 PM   #5
drummerwill
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Thanks guys! I wasnt sure on that. I'll just keep my eyes open for an OEM H23 plenum then.
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