99.5+ airbox Will fit early 99 models - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 08-06-2010, 07:19 AM Thread Starter
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99.5+ airbox Will fit early 99 models

I had asked in the general forum about if a 99.5+ model air cleaner assembly would work in our early 99 trucks. Everyone told me no. Well i just wanted to leave a message for future people to let them know that indeed the 99.5+ units will bolt directly into our early trucks without any modifications whatsoever, I just did the swap in about 10 minutes. Thanks
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post #2 of 15 Old 08-06-2010, 06:12 PM
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I did it in mine and it bolted right in but I had to get the rubber elbow tube that connects to the newer box. Running diy tymar now though.
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post #3 of 15 Old 08-17-2010, 04:36 PM
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Thanks for the info!

From what I've read throughout posts is that the AIS and AFE will work in our early 99's.
The AIS, will likely be my first mod for the truck. Not bad for around $250ish.

e1999 F250 7.3L XLT 4x4
- 2005 -07 conversion + 5k HID
- 2005 - Electric Tow mirrors
- 2005 - Running boards
- 2008 - Tailgate, tail lights and bumper.
- 2008 - 26 row transmission cooler.
- Hellas mounted on headache, 2 under the hitch.
- Tymar Intake, with AFE Big Boost.
- Adrenaline High Pressure Oil Pump
- Tony Wildman chip

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post #4 of 15 Old 08-20-2010, 03:32 PM
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Why on earth would anyone want to do such a thing? The factory air boxes on the e99 AND the 99.5-03 trucks all leak dust and do not flow enough clean air. Everyone I have opened up an looked at had at least some signs of dust trials and some wear on the turbo impeller. The DIY intake costs around $40 to do and takes about 10 minutes, rebuilding a dusted engine can cost anywhere from $4,000 - $12,000.


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post #5 of 15 Old 08-20-2010, 03:47 PM Thread Starter
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Originally Posted by alabamafrog View Post
Why on earth would anyone want to do such a thing? The factory air boxes on the e99 AND the 99.5-03 trucks all leak dust and do not flow enough clean air. Everyone I have opened up an looked at had at least some signs of dust trials and some wear on the turbo impeller. The DIY intake costs around $40 to do and takes about 10 minutes, rebuilding a dusted engine can cost anywhere from $4,000 - $12,000.


In my case the early 99 had a Aftermarket Ford extreme duty air cleaner installed and i wanted to keep it since i am selling the truck. I am keeping my 2000 so i switched them. So thats my "why on earth would i do it" reason.
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post #6 of 15 Old 09-13-2010, 06:41 AM
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I just installed the Ford AIS in my E99 and did have to mod it a bit. I have a Banks Intercooler and the tubes are larger I guess so I had to trim a little off the plenum to get it to fit. Folded back the rubber sheet that blocks off the side of the radiator and it now draws from the grille. I did look at the compressor wheel and all looked fine, but my truck has only 48K on it
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post #7 of 15 Old 11-09-2010, 04:24 PM
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I am curious to know if the S&B intake would fit our trucks? I believe you need the extra rubber elbow from the AIS in order to make the conversion easy...maybe thats why it dropped right in. I've heard some people say they work and some that they don't. I requested a drawing of S&B's intake from there engineer in order to find out for myself. The DIY is great and all and I have it now but not having anywhere for the Air Flow Sensor is killing me and causing my truck to sputter sometimes in the rain apparently.

Early 99 F-250 PSD, no stock but not built either, working on it.
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post #8 of 15 Old 11-09-2010, 05:08 PM
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Hmmm, I doubt the problem is your air flow sensor since there is no such thing.
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post #9 of 15 Old 11-09-2010, 05:46 PM
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air temp my bad.

Early 99 F-250 PSD, no stock but not built either, working on it.
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post #10 of 15 Old 11-09-2010, 06:06 PM
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Sorry, couldn’t help myself.
Most folks just tie the temp sensor to something out of the way but near the filter. It should still measure the air temp accurately since the air around the filter and the air in the intake tube should be the same temp unless something very strange is going on.
However I have seen folks drill the PVC elbow and install both the temp sensor and the restriction indicator into the PVC elbow. I’m too lazy for all that though.
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