Boxed Trailing Arm are laser cut from 4130 chromoly then CNC broke for extremely high quality and accuracy. We’ve meticulously designed our Boxed Trailing Arm to be a problem solving bullet proof solution for your X3. Our Boxed Trailing Arm solve all the common and weak points that typically cause failures on OEM arms.
The Boxed Trailing Arms come complete with bushings installed.
They have also paid very close attention to longevity as well. In doing so they have increased the mounting bushing size 25% to allow the same forces to be spread across a larger service area decreasing wear and increasing bushing life compared to any other arms on the market. Their bushings are even unique in material as we use a trademarked material called TIVAR® which is a very high quality UHMW-PE material which is resistant to most all chemicals and conditions you would encounter as well as having an extremely high wear and abrasion resistance.