I am primarily interested in increasing my MPG. With that in mind, which of the air mods, the K&N, Airaid, or Velocity Tube would give me the biggest increase. Please post your improvements?

 

The awful truth is that none of the performance mods will increase mileage enough to ever pay for themselves - although I don't tell the boss that!

Ian



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99 Expedition EB
5.4l, 4x4, 4.10 LS
WMS Tube, Bassani Cat Back Exhaust, Superchip Flipchip, PIAA Superwhites

 

If you want to pick up some MPG you should check into an electric fan or a Jacobs ignition. I have done both and they have both helped my MPG. The electric fan will pay for itself and the jacobs is more expensive and will take longer to pay for itself. I choose to give my money to Jacobs rather than the an oil company. If you need more information you can search for past messages (there are many about electric fans and some about the Jacobs ignition).

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My first Baby:
2000 SC XLT Bright Red, 4.2L
5speed
K&N air filter
3" intake mod
16" perma cool electric fan
Jacobs DIS
best 1/4 mile: 17.1 @ 81.53 MPH
total MPG average to date 19.15

My Second (but most important) Baby:
Hailey Jean, born April 9, 2000

 

If you're interested in increasing mileage, don't expect noticeable results with a FIPK.

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2000 F-150 XL, RC, LB, 5.4L, 4R70W, 4.10LS,
Class III tow, Payload #3, & Convenience pkgs.,
4-wheel disc/ABS, Chestnut/Parchment 40/60,
Ford bedliner w/Paintsaver & gas/wheel/spare locks,
K&N F.I.P.K. w/Outwears pre-filter, Superchip,
Dynomax ultra-flow welded 3" cat-back w/ 3" Y-pipe,
Hellwig front & rear anti-sway bars, Rancho RS 9000s,
Pirelli Scorpion Zero 275/60/16s, Mobil 1, K&N oil filter.