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Why different shackles for dual vs. single exhaust and are the needed?
#1
I was looking at rear springs and was going to go with the Eaton lowering springs(138ft/lb spring rate) from NPD. Any one use this spring or have any inputs?

I also saw some sites have a dual/single exhaust option for shackles but not NPD so I don't know if I really need them.

-Jim
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#2
The bolt heads or nuts are really close to the exhaust tips when you have dual exhaust. Maybe the special ones are low profile or something.

Mike
__________________________________
Black 1985 GT
Yellow 1973 Mustang Mach 1
Black 2012 5.0 GT, 6-speed, Brembo brakes, 3.73's
Wimbledon White 1966 F-100 Shortbed Styleside, 390ci, Tremec 3550, FiTech EFI
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#3
The stock shackles should have the studs pressed into one side of the shackle assembly, with the other side bolting on. Orient the 'pressed-in' side inward, toward the exhaust with the bolt-on side outward.

NPD has some Scott Drake shackles - which are typically correct for stock replacement. http://www.npdlink.com/store/products/mu...-2810.html

Hope that helps.

Eric

[Image: mach1sig2.gif]
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#4
The dual exhaust hangers have one stud on each riser. So that means the nuts are accessed from opposite sides. This makes it a lot easier to install in cramped quarters. The standard ones work also, they are just a little harder to install.
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#5
I'll take your word for it. Makes sense, I suppose. I think I used the ones like the Scott Drake shackles that came with my Laurel Mountain Mustang Super Suspension Kit.

Oh well - they work, and I'm going for concourse, so it's all good. Wink Big Grin

Eric

[Image: mach1sig2.gif]
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#6
sdstang,

Here is one thread that might address the question, who has the Eaton Springs?

http://www.7173mustangs.com/thread-which...ight=Eaton

mustang7173
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#7
mustang7173;169377 Wrote:sdstang,

Here is one thread that might address the question, who has the Eaton Springs?

http://www.7173mustangs.com/thread-which...ight=Eaton

mustang7173
NPD has the springs. They are $50/pair cheaper the getting them direct from Eaton. Also, NPD chared $30 for shipping. Eaton wanter $125.
  Reply
#8
sdstang;169384 Wrote:
mustang7173;169377 Wrote:sdstang,

Here is one thread that might address the question, who has the Eaton Springs?

http://www.7173mustangs.com/thread-which...ight=Eaton

mustang7173
NPD has the springs. They are $50/pair cheaper the getting them direct from Eaton. Also, NPD chared $30 for shipping. Eaton wanter $125.

Well I got new Eaton Detroit leaf springs in today and they look beat up and lots of rust spots. For as much as they cost I wasn't expecting that I would have to detail them. Not like I have enough things to sand and paint! Maybe thats why they are cheaper through NPD Sad
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