Im not sure if this thread is going to add fuel to the fire or if anyone really even cares, BUT I thought Id post this for people like me who like to look at the numbers advertised then get a real person using that product's opinion
on them. So, this is my opinion.
I installed the intake and TBody spacer about a week ago and the Jet module yeseterday.
1. K and N Air intake - I've used K and N filters for 12 years or more now and this was my first intake kit. Takes a little time but is totally do-able yourself in about an hour and a half as advertised. Here, I didn't notice quite as much power increase, but that's not honestly what I was really looking for with this piece. I felt like, if nothing else, letting the engine breathe cooler better filtered air for the entire lifespan just seems like the right thing to do. Relieve stress where possible to prolong longevity. Makes sense to me. Ill update after running it in another couple weeks.
2. Air Aid throttle body spacer - Oddly enough, the part I thought wasn't really going to do much probably gave me the most surprise. This was the first component I installed and what I first noticed was definitely a better throttle response. You hit the gas a bit and you feel it pull. One thing I wasn't aware of is it does make a slight whistle that sounds similar to a turbo. Not crazy loud, just wasn't expecting it.
3. Jet Performance Module PN 90901 - All info online initially pointed me to the wrong module. Had to return it and got the 90901. The only 2 complaints I have about this is the misleading info (and I did a LOT of research) about the correct part number and secondly, the instructions seem a bit misleading because in one section it says for a certain year range of Grand Cherokee's is in the first slot, then a different one said 3. Had to call JET to verify before I screwed something up and the correct port is the White port (#3).
That out of the way, I could also tell a definitely throttle response increase. Gun it down the on-ramp to get up to speed and it definitely feels better. Primarily what I was hoping for here was better shift points and slight MPG increase. Ive only had the thing on a day or two, so no increase yet but Ill keep my eye on it. The shiftpoints were actually way better than i was expecting. It always felt like my truck was staying in higher gears too long when downshifting and shifting very slowly from First on up. Im happy with the module all in all despite all my prep work out the window.
One other thing I may as well mention here...The videos of Jeep module installs dont make it very clear about the computer connectors so for anyone still with me thru this rant, you have to slide the red connector towards the front of the truck then push the little black springy piece down to dislodge the connector.
Overall, I am very happy with what ive done so far. It has made it funner to drive than it already was and hopefully I can increase the lifespan, have a little better performance and slight increase in mpg.
Hope this helps others later on.
P.S. Eibach lowering springs coming in on Friday