I had no success with the Jet Chip, didn't really do anything for me... After 4 months with it and 93 octane gas, I called up quadratec and the refunded my money for me stating that many people either have problems with the chips or gain no performance. I would say for $240 you can buy something that will help you such as exhaust, and so forth. Try the K&N FIPK also.
Black 2001 TJ, 4.0L, 5sp.
Mods: Rubicon Express 3.5" Superflex, Adj. Front Trackbar, [URL=http://jeephorizons.com/phpbb/viewtopic.php?t=786]Rusty's Steering upgrade[/URL], OME LTs, steering skid, JKS discos, and probably more :)
On order (thanks Uncle Sam): Jeeperman Rear Bumper/Tire Carrier, Upper Adj. CAs (front/rear), rear Adj. Track Bar, Oil pan skid, new steering skid, BPEs
[URL=http://jeephorizons.com/phpbb/viewtopic.php?t=645]My Jeep Pics[/URL]