ursmall

Forgot i had a 4mpg gain with header back and cold air intake with 31s i get about 17mpg around town now 15 high way with 3.73s cams intake tuner header back 3"on 35s

lkennamer

Which headers, CAI, tuner, and cam did you run? Cause thats badass! On my 2010 5.4 6" lift and 35s i get 11 in town and bout the same highway once past 55 and i gotta pretty light foot

ursmall

Best to start with checking how much play your rear has mine was like 32 back lash old then talked to a friend that is a ford tech and it needed to be 9/10 after tightening up the rear i got better gas....i have a k and n intake jba shortlys now edge tuner custom tunes and i dont remember what cams they are.. a friends shop did them as a birthday gift from my dad

lkennamer

Is the play what causes the axle wrap and what not? cause i get it aLOT haha. And thanks for all the info man

lkennamer

And how do you check how much play you have?

ursmall

You have to pull the cover off..with it jacked up and they make a tool to check it...its the play in the gears how much they move before the gears start to move around...and for axle wrap i made traction bars for mine and love them

PRNDL

I had my exhaust chopped off right after the cats. I had a custom true dual exhaust built. I used an X-pipe, dual pipes, to an 18 inch dual in / dual out magnaflow with duals out the back. The magnaflow also has a built in x pipe. The two x-pipes smooths out the exhaust real nice. NO popping or crackling at any rpm under any circumstances. I did research for a year to come up with the perfect exhaust.

PRNDL

More: Next up, Stainless Steel Works long tubes, race cats.

lkennamer

Alright cool thanks man. Yeah my gears move around a good bit i can feel em. To get that tightend do i just go to the dealership and tell them i need my differential gears tightend?

Downeast_auto

Here's my flowmaster cat-back kit. For me it's the perfect volume; pull away normal and you'll only hear it for 100ft or so, romp on it and you'll hear it for 100 yards.

I'm going to take a new vid today or tomorrow, this one doesn't really do it justice:


No noticeable performance gain, I don't have a tuner. 2010 5.4L