Thorley headers
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Senior User
Joined: May 2006
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Thorley headers
Has anyone actually installed these on and 2000-2003 Ex? Thorley is offering me an excellent price to be a "guinea pig" on these? My motor is out and I'm think about headers anyway.
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
I never heard of anyone trying the Thorleys on their EX but I don't spend a lot of time in the Ex section. I have them on my SD and like them a lot. If you can get a good deal on them I would definatly give them a shot.
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,253
Likes: 763
From: Houston, Texas
I failed to mention that a Super Duty and an Excursion are the same until you go past the front driver and passenger doors. So I'd say go for it....
Do a search on thorley header installation in the V10 forum and you'll find great instructions on how to install them.
Do a search on thorley header installation in the V10 forum and you'll find great instructions on how to install them.
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Senior User
Joined: May 2006
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Motor is in and headers installed. Mechanic told me that the headers were an easy install that if he took them apart he could reinstall them in 15 minutes. They fit without any mods. They look good and no more restrictive Y pipe. No real noticeable difference in sound. I am not supposed to take the motor up above 2500rpm for the first 500 miles, so I really don't know the difference in performance yet. I will post pics as soon as the mech sends them to me. One ? though, if anyone knows. The old motor called for 5W30 and the new one 5W20 does this seem right?
Elder User
Joined: Feb 2007
Posts: 805
Likes: 1
From: South Bend, IN
I noticed a sound difference with the headers on my truck but I'm also running a FM40 muffler so mine is probably a little louder than yours. At first I hated the sound but after awhile something must've broken in and it sounds SAHWEET!
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Sort of off topic, but how do those Dune Grapplers do in the sand and on the road in the rain?
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Joined: Feb 2007
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From: South Bend, IN
The tires are the only thing I regret buying for my truck. I only had them in sand for like a minute once and aired at 60 psi. They sank more than I expected them too but I can't say for sure of the performance of them unless they are aired down and I'm really using them how they need to be. I try not to drive in the rain because they make me feel like a danger to the public let alone myself. They hydroplane pretty bad and its sometimes tricky to take off on some wet surfaces. They actually make me nervous on the highway at highway speeds. Amazing in dry weather tho.
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