i just purchased the billet lower control arms from upr and they are wickedly awesome looking. problem is they came with no install instructions, torque specs, recommendations for hardware replacement- nothing not even a sticker. i emailed upr and got a response that said " i would torque the bolts to 50 ft lbs" everything i can come up with says 125 to 130 ft lbs is the torque called for this component. can i have some reassurance that the 125 range is the proper torque and not the ridiculously low sounding torque of 50 ft lbs?

http://www.pdfee.com/ford-mustang-rear-lower-control-arms-installation-instructions.html

.. Page 1 of 7 1-800-59-ROUSH begin_of_the_skype_highlighting 1-800-59-ROUSH end_of_the_skype_highlighting Ford Mustang Rear Lower Control Arms Part #R06030037 Installation Instructions Application: 2005 – 2006 Ford Mustang Before … step of the installation manual … 1306-R06030052-AA Page 1 of 7 1-800-59-ROUSH begin_of_the_skype_highlighting 1-800-59-ROUSH end_of_the_skype_highlighting Ford Mustang Rear Lower Control Arms Part #R06030037 Installation Instructions Application: 2005 – 2006 Ford Mustang Before installing your Roush Performance Product(s) , read through the entire installation procedure and check to make sure all items are present. Packaging List for Complete Rear Lower …
1306-R06030052-AA Page 2 of 7 1-800-59-ROUSH begin_of_the_skype_highlighting 1-800-59-ROUSH end_of_the_skype_highlighting Equipment and Supplies Required • 18mm Wrench or socket (1/2″drive suggested) • Torque Wrench with 75 to 200 Nm (50 to 150 lb-ft) capacity • Pliers • Two front lower control arm bolts, Ford Part No. W704886 • Two rear lower control arm bolts, Ford Part No. W704888 • Two forward lower control arm nuts, Ford Part No. W710089 • Two rearward lower control arm nuts, Ford Part No. W704991…. 1306-R06030052-AA Page 3 of 7 1-800-59-ROUSH begin_of_the_skype_highlighting 1-800-59-ROUSH end_of_the_skype_highlighting Disassembly Note: All photographs show the left hand side installation, unless noted (Right hand side is similar). All steps must be repeated for the right hand side. Raise Vehicle 1. With the vehicle on level ground and at normal ride height, place a mark on each rear shock where the dust boot meets the body of the shock. 2. Locate a level, stable and clean surface, suitable for supporting the vehicle on jack-stands. 3. Chock front wheels. 4. Refer to the Owner’s Manual to identify the correct location of the jack for raising the vehicle. Jack up the vehicle, and secure it on a pair of jack stands to the frame (not the rear axle), again referring to the Owner’s Manual for jack location points. Warning: Never leave any vehicle supported by only a jack. Always use jack-stands. Serious injury and/or death may result. 1306-R06030052-AA Page 4 of 7 1-800-59-ROUSH begin_of_the_skype_highlighting 1-800-59-ROUSH end_of_the_skype_highlighting Disconnect Emergency Brake Cables 1. Remove the retaining clips (Item #1) that hold the Emergency Brake Cables to the Caliper Brackets. Remove the cables from the brackets. 2. Unclip the cable ends (Item #2) from the actuators. Pull the cables back out of the stock control arms. Remove the Control Arms Note: Perform a complete installation on one side at a time to keep the axle from shifting out of place during installation. 1. Remove the stock rear control arm bolts. Discard the rear nut and both bolts



American Muscle install instructions

http://www.americanmuscle.com/jm-rear-lower-control-arms-0509-install.html

Install the suspension arms by simply reversing the removal procedure. Hold the arm in place, and run the bolts back through. I recommend using some threadlock for extra insurance against loosened bolts, especially if you reuse the factory bolts. The tab on the rear bolt will probably turn itself back around before locking into position and preventing the nut from turning. Ensure that it doesn’t catch the parking brake cable or brake lines as it spins. Once the bolts are snugged up with the socket wrench, use a torque wrench to tighten both bolts to 129 ft/lbs.



tigerhonaker

 

UPR may know better about their arms. I have UMI on mine and called before installing them because of the same kinda torque question. Most specs say over 100 lbs.
UMI told me 75 lbs was plenty. That's what I did and everything has been fine.
Just my experience.