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Old 05-21-2013, 06:29 AM   #2
Sonic Mustang
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Join Date: Feb 2013
Vehicle: 2004 Mach 1
Location: USA
Posts: 545
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Ford authorized a Lock N Stitch repair kit for damaged spark plug threads on out of warranty modular engines.

Call these guys to make sure you buy the right kit. They have the TSB approving Lock N Stitch on the web page.
http://fulltorque.com/sparkplug.htm

Last edited by Sonic Mustang; 05-21-2013 at 06:31 AM.
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