Again, don't forget to update us with any MPG changes after a couple fill ups! :-)

i will, i always am doing the mpg math when i fill up and when i get to each quarter i rough it in by guestimating the amount of gallons per quarter from the last fill up

Did the same modification. With the very same guy. Nice power increase but no MPG increase. I also got a freer flowering mufler. Once again a few Horsies but no MPG. Next step is injectors. Maybe you'll have better MPG results.

Nice to hear!
Putting this on my list.

nice i have an aftermarket intake, bored TB and TB spacer. with the spacer and bored TB combo, it whistles pretty good. had some ricer convinced i had a turbo on my jeep hahaha

i got both the tb and spacer for $50 from a friend who swapped a 318 in his zj and i got it off his old 4.0 he was putting back in the other zj that had the 318. noticable difference from stock

ok guys, i got a decent gas mileage increase with this tb over hte stock on a 5" lift and having 31s with 3.55 gears/auto tranny.

i am getting about 15-16 in town now. thats great compared to before. i get hte same as the wife's liberty gets and mine is alot higher and has 10k more miles.

oh, also!!! from a stop and flooring it to get hte heck out of the way of an oncoming big truck, i can make the tires growl. i would say smoke them but they make a cool low roaring growl because of how wide they are. like roooooaaaaar. my youngest son thought it was cool sounding. never really tried it but since this was an emergency situation, i stomped it to the ground.

is this like plug n play for the i6, or is there anything else that i would need? and what is that core thing that costs an extra 70$ on his site?

yeah, Jeff has good customer support. mine sticks a bit when it gets really hot. but that's not a big deal at all. although i have never heard it to roar like a cone filter or whistle. frankly mine didn't change the noise at all.

yeah youd need a cone filter and tube to really hear the whistle. i put my stock intake back on in prep for making a cowl induction and the whistle is pretty much gone now.

the core is the cost of replacing the unit if you don't send yours back to him. once you send your stock unit back to him, he will refund your core charge.

it is plug and play

great customer service from that company also. we have 2 brothers that installed these on their rigs and theirs makes no noise. also what did you do to get better MPG? theirs didnt change at all and same with a member here.

i think i had rolling resistance that i worked out at hte same time as i did a little brake work. it could be that i "get into it" alot less though too because it takes off so much better. i used to have to really give it some gas to get rolling with the 31s, now i just take off really easily.

i am getting 180 to 200 miles a tank now versus 150ish. this jeep has had a brake problem till recently so that bad gas mileage previously could be attributed to the brakes as i think they were dragging. they never overheated but it felt weird. now, it feels fine.

all i know is the fun factor in driving is worth the cost of the part. if you get better mileage, hey its a plus. if it stays the same, oh well, at least you drive smiling every where now

wow dude, that's still pretty low. the lowest i've had from one tank was 288 miles. might wanna see what else is robbing horsepower.

You're also comparing your Cherokee thats 12 years newer....

And that seems about right....Because I figured out, its about 220 for mine.