lil bit

Joewee I haven't had it on long enough for the computer to really reset maybe 300 miles on the kit. So by the time that i post a video of the sound hopefully the computer will have did a somewhat self tune to the mods. Don't think it will come close to the hearthrob gains in horsepower; if i had to guess 15-20 horsepower gain maximum. Unless you go with the Hushpower Pro Series mufflers which are similiar design to the hearthrob muffler because my force II muffler looks identical to my chambered muffler that a had on my 08 5.4 3v which i traded in for my ecoboost. Don't know why that is guess that to keep it a quiet and less aggressive for those who don't like the louder mufflers, personal opinion.

medicff0879

True, surely not though LOL!!

Joewee3.5

So it's a chambered muffler? Sounds more restrictive than stock. I hope you're right about picking up hp. I didn't know the comp had to take some mileage to learn the mod. I put my muffler on when I received delivery of my truck haha.

Killer5.0

i have the 5.0 took it on a trip to New Orleans i got 20.8 mpg

medicff0879

Who cares, this is NOT ANOTHER MPG THREAD!! There are MORE THAN ENOUGH of those GD battles on this site!! This is about the Flowmaster exhaust specifically built for the ECO!!

Killer5.0

i dont care i heared the flowmaster on the eb and it didnt sound right to be

Rhyder

I got 32 MPG once on my Eco FX4 SCREW.........

Killer5.0

thats good im not here to start ****

medicff0879

Who gives a s**t what you think? You have a different motor and this argument has already been started (and battled out endlessly) elsewhere. Now, go away troller!!

Killer5.0

i work with lil bit so i know what it sounds like