The GPM LU4009 is fabricated from aluminium 6061 T6 to provide a rigid, low play mounting point for the TEAM LOSI LASERNUT TENACITY U4 rear lower arm. This part reduces hinge pin clearance and improves fitment tolerance between suspension components. POM inserts are used at pivot interfaces to combine strength with controlled compliance, while the included POM shims enable precise spacing adjustments for consistent suspension geometry.