The bottom line is unfortunately the OEM cable is still the strongest built clutch cable on the market available for mustangs. This cable is now made in Taiwan, but it still boasts the same quality (surprisingly). Aftermarket cables such as the stock replacements that can be purchased at Auto Zone, and ALL adjustable type cables are simply not made to the same standards as the OEM non adjustable cables. Multiple problems could arise such as stretching (common) and binding. There is quite a bit of information about this on the internet. While an adjustable cable can ultimately provide more adjustability, my personal recommendation is to stay away from them and use the OEM non adjustable cable with a firewall adjuster. However, just to be fair, I have talked to numerous people who have never had a problem with the adjustable cables and swear buy them. In my opinion, if you already have one, and don’t have any complaints, don’t go out and spend money on an OEM cable unless you really need it. If your buying an aftermarket adjustable setup for the first time, and you don’t have any cable issues, I would recommend keeping the stock cable already in your car. Maximum Motorsports talks about this very subject and why the adjustable cables are not as desirable.
If you need to purchase another OEM style cable, then purchase an original Ford cable, new or used. These are still made and available from Ford (at a significant cost) or many aftermarket companies offer this cable for around $30-$50. Some of these companies are Maximum Motorsports, Diversified, and Fortes.