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Old 04-25-2011, 10:54 AM
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early 99 7.3 intake

I am looking into putting a intake on my early 99 7.3. I am wondering what intake would be the best. I want to add an exhaust and tunes so I will need something that flows well but also gives good filtration. I am looking into the ford AIS system but am not sure if it will give me enough flow. I need sugestions on which intake to use.
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Old 04-25-2011, 11:13 AM
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I am running the AIS on my truck and l like it.
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Old 04-25-2011, 12:14 PM
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Do It Yourself (DIY) intake will cost ya less than $50, and takes 15 minutes or less to install... and gives massive increase in air flow!

You will need:

- WIX/Baldwin or equivilent air filter, mine says DuraLite 546637 on it, any parts store can interchange the numbers

- 4" OD exhaust pipe about 5" long

- Hose clamp to fit over the filter neck, about 4.5" in diameter.

Remove the old air filter houseing. Flip the stock air intake tube end-for-end, and twist as needed to get the angles right, the new 6637 filter will sit at an angle to the fender and battery. Be sure to remove the air temp sender from the old air box, just zip tie it to something near by. Use the 4" pipe to adapt from the stock air tube to the new 6637 filter and tighten the hose clamps. You're done.
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Old 04-25-2011, 12:20 PM
JEL JEL is offline
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I had a DIY on mine for a while and it was just fine, but it can get a little noisy. It filters well and flows excellent, but I ended up going with the AIS recently. I haven't noticed any loss of performance and I know it's filtering better than anything else on the market, plus it's quiet and looks completely stock.
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Old 04-25-2011, 12:59 PM
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X3 on the AIS. Specs say it flows 750CFM which is almost twice what the stock box will do.
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Old 04-25-2011, 04:10 PM
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Best is a Tymar or correctly made clone..but that will cost lots more than $50
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Old 04-26-2011, 04:33 PM
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DIY 6637...Love that whistle!!!!
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Old 04-29-2011, 03:46 PM
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Ive got the banks ram air on my rig and yea its one hell of a pretty penny but it really did a lot of improvement, its running really clean now and has a lot more power than when it used to.
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Old 04-30-2011, 10:48 AM
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A little off topic, but where can I get one of the gaskets that fits the fender intake on my E99? The plenum that pulls air into the box is too small and I need to drill the housing for better flow.
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Old 04-30-2011, 01:10 PM
JEL JEL is offline
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Quote:
Originally Posted by Degnol View Post
A little off topic, but where can I get one of the gaskets that fits the fender intake on my E99? The plenum that pulls air into the box is too small and I need to drill the housing for better flow.
Ford 7.3L Powerstroke AIS Intake Foam Fender Sleeve

Definitely will pull more air with this installed and the airbox cut. I've thought about going that route as well but I decided I will just run my DIY in the summer and unmodified AIS in the rainy months up here. I did go with the waterproof Donaldson and filter cover for the DIY but the fact that the filter was sitting under a water channel made me a wee bit nervous, so I just run the AIS when we are under our 10 months of straight rain in Seattle. That said, they are both great IMO.
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