LT Headers
2nd Gear Member
Joined: Apr 2008
Posts: 394
From: Maryland
Bam! I knew it!
Then again, you have 4.10s and cams, so you can't be too worried about gas I guess...
I'll tell you this. I had ARH 1 5/8" LTs and O/R X with the Borla Stingers, and the trumpeting was too much for me. I switched to Pypes mid-mufflers and the trumpeting is a lot less, but it's still there to a degree. I just hope I don't have to change any part of the exhaust once I get my cams in.
Then again, you have 4.10s and cams, so you can't be too worried about gas I guess...
I'll tell you this. I had ARH 1 5/8" LTs and O/R X with the Borla Stingers, and the trumpeting was too much for me. I switched to Pypes mid-mufflers and the trumpeting is a lot less, but it's still there to a degree. I just hope I don't have to change any part of the exhaust once I get my cams in.
To the orginal question I won't know until after the weekend when I put my long tubes on but I doubt it will be a big difference.
2nd Gear Member
Joined: Aug 2009
Posts: 157
From: Fort Worth, TX
I have noticed an increase in mileage with my Kooks LT's and high flow cats, although it's only been about 3 weeks. I do mostly city driving, and I would stay very consistent on the car's computer at 14.4 MPG, even after several resets. After the install (and a reset) I have been at 15.7 with the same fairly aggressive driving habits. I was pleasantly surprised.
5th Gear Member
Joined: Oct 2009
Posts: 4,752
From: Maui
I have the deluxe interior so I have no computor to remind me of how bad my MPG is!! LOL
My headers have been in for 3 weeks also and I really dont see a difference yet. I have read where cams are the gas hogs not headers.
patrick
My headers have been in for 3 weeks also and I really dont see a difference yet. I have read where cams are the gas hogs not headers.
patrick
5th Gear Member
Joined: Feb 2007
Posts: 2,211
From: Hawaii
what kind of MPG's are you getting?
I drive 100% city in a 35 mph zone from my house to work and back....I also drive extremely spiritedly (lots of wheelspin from lights)
and I get 15.5 mpg damn near every single tank...and I've only got 2,960 miles currently. Once the motor gets broken in slightly, I won't be surprised if I see another 1-2 mpg gain.
conversely, my last F-150 was supercharged and got 12.5 mpg on the same commute. That was well worth it. You have to pay to play. As mentioned above, the $$$ of LT's is going to take alot of miles before you see a turn-around.
I drive 100% city in a 35 mph zone from my house to work and back....I also drive extremely spiritedly (lots of wheelspin from lights)
and I get 15.5 mpg damn near every single tank...and I've only got 2,960 miles currently. Once the motor gets broken in slightly, I won't be surprised if I see another 1-2 mpg gain.
conversely, my last F-150 was supercharged and got 12.5 mpg on the same commute. That was well worth it. You have to pay to play. As mentioned above, the $$$ of LT's is going to take alot of miles before you see a turn-around.
