15fx43.5

Received the magical email from 5 star tuning. I purchased the sct x4 with 3 of there tunes. 91 performance, 91 performance/tow, 87 performance/tow and wow all 3 tunes are amazing but the 91 performance is simply crazy. Just a stock truck with 3.5 ecoboost the thing literally flys. Very happy with them. Would definitely recommend.

fourload

5 star tunes rock.They worked great on my 13. Can't wait to tune my new 15

15fx43.5

It is just unbelievable how fast a 4wd truck can be lol

BoozeDaily

iTrader: (2)

Awesome! Glad to hear you're happy with 5*. I went with them as well on my 2.7LEB. The 93 performance is ridiculous, but they're all really good and provide a noticeable difference when driving, even the 87 eco tune.

bign1497

My engine is a 3.7 in a 2011 RCSB. How much power gain would I get with a tune? Could someone explain how they're installed. "Old timer not too computer savy".

1fifty

Has anyone here used the 87 eco tune on the 2.7 and see a consistent mpg increase?

thekevin

I am waiting to get to 5k miles on mine before I tune it. It shouldn't take long since I have put 2k miles on in the first two weeks.

Takeda

Congratulations! You can kiss your drivetrain warranty goodbye!

15fx43.5

Nah best friend owns dealership. Return to stock before taking it in. Thanks for your concern though.

15fx43.5

Return to stock, disconnect battery for 10 minutes..no proof. Talked to the service department at dealership. All is good.