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Q&A > General Tech Advice > XR to XY Disc stubs - same as Mustang stubs or not > Community Forums > Mustang Forum Australia - Mustang Tech

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XR to XY Disc stubs - same as Mustang stubs or not Reply to topic

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mikes68
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Hearing bits and pieces around a number of conversations relating to falcon disc brake stub axles that suit the (in my case 68) Mustangs.

Can anyone provide me with the definitive answer on whether or not the XR to XY stubs are all the same and are suitable for the 68 V8 Mustang as I can pick up a pair of XY V8 disc brake stubs for about $100.


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boofhead
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XY stubs are 3/8" taller (which improves the angle of the upper wishbone (like a mini-Shelby drop). I have them in my 67 Cougar.


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mikes68
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boofhead wrote
XY stubs are 3/8" taller (which improves the angle of the upper wishbone (like a mini-Shelby drop). I have them in my 67 Cougar.


Thanks Dave. I was just informed they may be early XA... Any knowledge on them?

What about the ball joints, are they the same size as the 68 Mustang V8?


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Shaunp
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XY-XB are 3/8 taller, Some XB/XC are same hight as mustang XD-XF 3/8 taller
You want the taller ones to improve the camber curve, not quite the same as a shelby drop but it does make a differance. The Nascar boys strated making tall stubs in the early 60's to improve camber curve cause they couldn't alter the top arm pivots. Depending on the wheels you want to run you need to keep an eye on what size hubs you use,
My car below, XY disc, stub, XF alloy girlock calipers, this is the best set up. You can Buy EBC pads for these, and they are light.
Falcon stuff is all interchangable 6 & X8 are the same. Ball joints are the same. You need to use falcon outer tie rods to suit the stub. Hoses are the same as 68 on Mustang disc or any disc falcon XY-XF



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mikes68
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Shaunp wrote
XY-XB are 3/8 taller, Some XB/XC are same hight as mustang XD-XF 3/8 taller
You want the taller ones to improve the camber curve, not quite the same as a shelby drop but it does make a differance. The Nascar boys strated making tall stubs in the early 60's to improve camber curve cause they couldn't alter the top arm pivots. Depending on the wheels you want to run you need to keep an eye on what size hubs you use,
My car below, XY disc, stub, XF alloy girlock calipers, this is the best set up. You can Buy EBC pads for these, and they are light.
Falcon stuff is all interchangable 6 & X8 are the same. Ball joints are the same. You need to use falcon outer tie rods to suit the stub. Hoses are the same as 68 on Mustang disc or any disc falcon XY-XF



Thanks Shaun. So the original 68 Mustang calipers I just picked up from Steve can't be used on the setup you described above? Or can they?

Is there any other differences in the geometry of the stubs that you know of?

Sounding pretty much like a straight fit up apart from the tie rod ends.


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Shaunp
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Yeah I think they will bolt up to an Xy stub as XY brakes are Oz made KH Mustang brakes. But The XF calipers are by far the best to use. Just make sure you get Sedan stub axles, Fairlanes, wagons XA on have a different ackerman angle for the long wheel base.


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Shaunp
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XY calipers



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mikes68
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Shaunp wrote
Just make sure you get Sedan stub axles, Fairlanes, wagons XA on have a different ackerman angle for the long wheel base.


Good to know Thumbs Up


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Shaunp
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My advice is to use the early stubs with the newest Calipers, the English EBC pads are the gas, they have several compounds to suit the use you have up to full race. The Blacks are about $65 a set and are great for general driving they will stand on their nose when you look at the pedal.
Hunt down some Alloy GirlocK XF units. Bolt paterns on the stubs are all the same, so any caliper xy-xf is swapable.


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Shaunp
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mikes68 wrote
Shaunp wrote
Just make sure you get Sedan stub axles, Fairlanes, wagons XA on have a different ackerman angle for the long wheel base.


Good to know Thumbs Up


But if you are planing on doing alot of drifting get the fairlanne ones, they have less ackerman which is a drifting set up trick.


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mikes68
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Shaunp wrote
mikes68 wrote
Shaunp wrote
Just make sure you get Sedan stub axles, Fairlanes, wagons XA on have a different ackerman angle for the long wheel base.


Good to know Thumbs Up


But if you are planing on doing alot of drifting get the fairlanne ones, they have less ackerman which is a drifting set up trick.


Ha ha - not likely but thanks again for the advice


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mikes68
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Shaunp wrote
XY calipers


Just took a pic of my 68 caliper... Will edit and post up a little later but from the same (photo) angle they look exactly the same.

Edit: Here's the pics I took







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Last edited by mikes68 on Fri Jan 04, 2013 3:19 pm; edited 1 time in total

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mikes68
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Shaunp wrote
the English EBC pads are the gas, they have several compounds to suit the use you have uThe Blacks are about $65 a set and are great for general driving they will stand on their nose when you look at the pedal.


Are these Ultimax brake pads the ones you mean?


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Shaunp
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mikes68 wrote
Shaunp wrote
the English EBC pads are the gas, they have several compounds to suit the use you have uThe Blacks are about $65 a set and are great for general driving they will stand on their nose when you look at the pedal.


Are these Ultimax brake pads the ones you mean?


Yep, but you have to bed them correctly, and then yu can get red and green.


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Shaunp
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They only fit the Girlock XF caliper though.


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