When only the best will do, say it with billet! These billet rear lower trailing arms replace the stamped steel OE parts, and depending on your desired performance goals are available with urethane bushings or a sperical bearing/urethane bushing combination for high horsepower applications.These lightweight yet super strong arms reduce un-sprung weight and eliminate wheel hop. Steeda was first to market with these control arms and had them on the shelves even before the 2005+ Mustang was released thanks to our exclusive technology transfer program with Ford Motor Company. Steeda was the first to incorporate the proper design rear offset for the rear lower trailing arms. Don't be fooled by other companies claiming to be first with this offset, yet they have only had their arms on the market a few months! Steeda's exclusive polyurethane bushing package also ensures smooth, quiet operation combined with performance. No increase in NVH (noise, vibration, harshness) with our poly bushings like competitors arms. Steeda Billet Rear Lwr Trailing Arms 05-12 Mustang GT 555-4405 Rear Control Arms Lower Aluminum Polyurethane Bushings Ford Mustang (Set of 2)Pit Stop USAoffers Steeda Billet Rear Lwr Trailing Arms 05-12 Mustang GT 555-4405 at low everyday prices. Be sure to check out all of our products from Steeda including Steeda Lower Rear Control Arms.