I just read this article in Peterson's 4Wheel & Off-Road Feb. 2000 about three common bolt on upgrades. They installed a Gibson Cat-back, K&N FIPK, and a Jet Chip in a 99' F150 5.4L auto. The Dyno test showed 241 peak HP stock, and 267 peak HP with all three mods. There are some pictures of all three being installed in the magazine. I wish the same was done with the Superchips instead of the Jet, since most of us have the Superchips.

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'99 F-150 XLT SC 4x4 5.4L Auto 3.55LS Tow pkg skid plates , Superchip, Gibson cat-back, K&N filter

 

That's a lot of $$$ for a little over 10% increase in HP.
The superchip alone is close to that but costs less.


[This message has been edited by 54regcab (edited 01-11-2000).]

 

The superchip does add a 10% increase in HP and 15% in torque. 247hp stock sounds kinda high to me.

 

That 241peak hp was at 5000rpms, that might be why its high.

 

Just picked up the mag, and yep, 241 and at 5000rpm! That shows Ford is the leader when getting it to the ground!