for some reason a lot of people are against the cold air intake and chips??
I have a K&N FIPK and notice a difference in response.
CAI: Intake mods should probably be followed with throttle body upgrades, and or exhaust upgrades. helping the engine breath better is going to add efficiency and make the work it performs easier. You won't notice a lot of power increase from a CAI but you may notice some, mostly you will notice throttle response.
Chipping: Chipping generally re-tunes the engine for a specific purpose. You may see gains in certain areas but that will create losses in others. The most common effect of a chip is to re-tune the engine to more readily handle a higher octane fuel, thus giving it a slight power increase.
I would probably go intake stand alone, or intake and chip.
There are a lot of threads on this forum about them.
Basically, the Jeep breaths just fine stock, CAI systems do nothing.
Chip can change shift points, and adjust the spedo against gear/tire changes, they can't boost HP.
I went with the Edge Trail Jammer kit, cold air intake, larger throttle body, and "inline" computer (to modify signals to and from PCM). I noticed quite a large boost in performance, primarily throttle response and high rpm pull (and don't need to run premium fuel).
The benefit of a larger throttle body is quite debatable (I probably wouldn't get one if it wasn't in the kit).
The only downside I've had with this set-up is that it is LOUD at idle. Primarily COLD-high idle. A high pitch whistle like a supercharger or something. It's ok once warmed up on regular idle.
I reduced some of the whistle by porting/polishing the idle passages in the T-body.
A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models!