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Old Nov 11, 2013 | 10:19 PM
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Default Holley intake manifolds
Hi, Im looking to add an intake manifold to my 99 ss. Cant seem to find much comparing the holley mid rise manifolds to others like ls6 or FAST. Anyone on here use the holley one?
heres a link of the manifold im talking about https://www.holley.com/300-126.asp
any feedback would be appreciated.
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Old Nov 12, 2013 | 04:11 PM
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no one uses holleys?
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Old Nov 12, 2013 | 05:47 PM
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Im not sure but i think one time i saw someone comparing that and a LS1 and said it made 15-20 more. It might have been a high rise i cant remember
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Old Nov 12, 2013 | 06:16 PM
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The mid-rise will kill your power if it's an n/a car, so don't bother.
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Old Nov 12, 2013 | 06:18 PM
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There are several people on here using them. The problem with them is they don't clear the cowl on a stock F body and require some cutting to fit.

IIRC that intake likes a different cam profile compared to a plastic intake due to the different runner length.
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Old Nov 13, 2013 | 10:00 PM
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curious to see if anyone has real tested results on these as they are cheaper than the fast units.
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Old Nov 14, 2013 | 12:34 AM
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Originally Posted by 00ssmg
curious to see if anyone has real tested results on these as they are cheaper than the fast units.
That's why i posted here cant find any testing except on a ls3 based car where the high rise made more than a Fast.
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Old Nov 14, 2013 | 07:28 AM
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With a high-rise, you're going to lose wipers... A mid-rise will require some cutting and you'll need subframe spacing to keep the wipers.

Honestly, just go with a FAST.
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Old Nov 14, 2013 | 08:42 AM
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Originally Posted by roninsonic
With a high-rise, you're going to lose wipers... A mid-rise will require some cutting and you'll need subframe spacing to keep the wipers.

Honestly, just go with a FAST.
That's why im leaning towards the FAST. The car has 11k miles on it, I don't want to cut it apart.
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Old Nov 14, 2013 | 10:03 AM
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Isn't there a low rise Holley intake? I think the intake would be great, given you have a correct cam profile to match it.
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Old Nov 14, 2013 | 10:14 AM
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Well, kinda.....

http://www.holley.com/300-121.asp

Not gonna do it, noooot gonna do it.
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Old Nov 14, 2013 | 11:45 AM
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Id go with the FAST instead. I wouldnt run a Hi-Ram unless im trying to run high RPMs.
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Old Nov 14, 2013 | 01:04 PM
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Originally Posted by Rise of the Phoenix
Isn't there a low rise Holley intake? I think the intake would be great, given you have a correct cam profile to match it.
I think the intake is promising given the number of options you can choose from, (runner length etc.) It even comes with the rails and everything you need to install. The price is what makes it so enticing. Its like half the price of the FAST, but I want to see some dyno results comparing the two, or at least a comparison to a ls6 intake or even a stock one.
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Old Jan 5, 2014 | 04:47 PM
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TTT Does anyone have pictures of the Holley Mid Rise in a gen 4 car? I would like to know to what extent, if any, were cowl modifications made. Also would like to see some true dyno pulls comparison between the mid rise and the fast. Thanks
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