Cheapest Real Power Gain For a Jeep with the 4.0 L6

Owning a Jeep is awesome if you are the adventure type person (or even if you are not). Some of the cons would be comfort as the ride could be a little rough and off course if you like speeding it is not for you. Overall, once you own one, you will always have a Jeep.

28 psi front, 30 psi rear (check dealer sticker on drivers door - some models vary)

Power causes the transmission to change up sooner and more aggressively for quicker acceleration. But it uses more fuel and gives less ride comfort.

Comfort means tat the transmission changes up at a more leisurely pace and the changes themselves are smoother. It uses less fuel and gives a less jerky, more comfortable ride.

Power is harsher on the vehicle as a whole; it will cause the vehicle to need servicing and possibly repairs more frequently as it puts everything under greater stress. Comfort is kinder to everything, servicing intervals can more safely be "stretched", repairs will be less frequent and likely less costly and the shocks, tires, brake pads and rotors will all last a bit longer.

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Poor ride over bumps is generally caused by worn or leaking shocks or strut cartridges...Most loose some ability to perform correctly in two or three years. Generally the fronts wear a bit faster than do the rears because they bear the weight of the engine and transmission, but you should have the rears checked as well. Buy the best ones you can afford but don't go overboard or you can end up with ones that are more durable than the OEM units but too harsh for most people's comfort. Except for "exotic" units such as Koni, price generally indicates quality...cheaper ones don't have the capacity to perform well, so a good mid range price will generally be the best choice.
You thought of this already...Why didn't you do it?.

That all depends on what you are looking for in a car. An Exige or Elise makes a great track car/daily driver. So if you are the kind of person that will take your car out and really use it to its potential, then a Lotus is great for you, and you can stop reading here. If that is not the case, read on my friend. Before I go further, let us determine pricing so we can loot at some alternatives. A new Exige will set you back about $60k when all is said and done, with the Elise doing about $50k in damages. Not exactly the cheapest cars on the road, but certainly not as expensive as most others in their class. If this will be your primary vehicle, or you will not be tracking it on a semi-regular basis, then you may want to consider something a little more subdued. In the same range you can try out the new BMW 335i, which boasts some incredible stats for a non-M BMW. Decent track abilities, and incomparable comfort and performance for normal to 8/10ths driving. But again, if you are buying a vehicle for the track, then look elsewhere. If you wanted to spend a little more money, a 2008 M3 would work nicely. Do a quick google search, and you'll be impressed. Those 2 above ideas were just a small sampling of the cars in that price range that offer good performance. Now lets change gears: if this WILL be a track car, with little use as a daily driver, you may want to consider the Ariel Atom. *pause while I look at their website*. Well, they changed a little bit in the last year or so, prices went up a bit. Anyway, for about the same price as an exige, you can get a 250whp open cockpit road legal race car. Look on youtube for videos and prepare to be amazed. Anyway, hope this helps somewhat.