max energy econ

[Walkercraig01]

so I know its not blackbear tune and I know that's the best route by far.. but I saw a good deal on one of these for cheap for the 04 Yukon and wondered if anyone has experience with them atleast for the mpgs and transmission firmness

 

[drakon543]

minor firmness upgrade for the trans barely noticeable and mpg will also be slight to maybe .5 mpg better. if you have any upgrades (cai, catback) you may only notice the firmness on the trans. i asked them directly once a while ago and what they told me is they are meant for completely stock setups. all i had at the time was a cai and catback and they told me it wont help beyond what i already did.

 

[Walkercraig01]

its stock for now. im only considering it because its really cheap and im gonna do a muffler swap and a mit tube and a filter rhar ould be it

 

[Walkercraig01]

talked to the guy im going to try and get it before my 520 mile highwat trip in the Yukon so hopefully I can and install the updates aswell