For drivers who love off road adventures, they know they can trust Alpine products. The Teraflex Alpine Front Lower Flex Arm comes with the installation kit and is perfect for drivers in need of an after market upgrade. Offering durability and practicality, the flex arm is maintenance free and fully adjustable. Made from high quality bushings (factory version), the flex arm minimizes vibration and noise due to the rubber bushings (damping) located at either end. The powder black coating is corrosion and rust resistant and the pinch collar is a sturdy aluminum that will lock into place once the joint is in the proper position and length has been established. The wall DOM is 1 5/8 inches by 0.156 inches and there are no maintenance joints as this helps to keep the flex quiet and smooth.