Dongfeng GX truck parts First level step left connection bracket 8406161-C6103

To withstand road vibration and minor under-vehicle impacts, the 8406161-C6103 bracket features a reinforced triangular structure—optimized via finite element analysis (FEA) to distribute stress evenly across the chassis and step. The bracket’s chassis-connection section integrates two 3.8mm-thick diagonal ribs that reduce bending stress by 42% during step use, while the step-connection surface is milled flat (surface roughness: Ra 3.6μm) to ensure a tight, stable fit with the step plate. A rubber anti-vibration gasket (shore hardness: 58±5A) is included between the bracket and chassis, absorbing 78% of road vibration (frequency range: 10-2400 Hz) to prevent bracket loosening or weld fatigue during long-haul driving. Additionally, the bracket’s edges are rounded (4.5mm radius) to avoid sharp protrusions that could damage nearby components or pose safety risks during maintenance

Exposed to road salt, rain, mud, and humidity—common in under-vehicle environments—the 8406161-C6103 bracket undergoes a rigorous three-step anti-corrosion process to extend service life. First, a zinc phosphate pretreatment (14-16μm thick) creates a porous base that enhances coating adhesion and blocks initial moisture infiltration. Second, an electrophoretic primer (20-23μm thick) provides uniform coverage, even in hard-to-reach weld joints, forming a barrier against rust. Finally, a matte-black polyester powder coating (80-90μm thick) meets ISO 10289 standards, passing 1200-hour neutral salt spray tests without red rust formation. This protection ensures the bracket resists degradation in coastal (saltwater), snowy (road salt), or industrial (chemical debris) areas, maintaining structural integrity for over 9 years—outperforming uncoated steel brackets by 300%

Exclusively tailored for Dongfeng GX heavy-duty trucks (including cargo, long-haul, and dump variants), the 8406161-C6103 bracket strictly adheres to original equipment (OE) specifications. Manufactured using 3D laser scanning of the GX’s left-side chassis and first-level step mounting points, it achieves dimensional accuracy within ±0.13mm—matching every hole position, contour, and connection feature of the truck’s original structure. The bracket includes 5 pre-drilled mounting holes (M9 threaded, 14mm depth) that align perfectly with the GX’s chassis rails and step assembly, eliminating gaps that could cause rattling, misalignment, or premature wear. It is fully compatible with all Dongfeng GX models produced since 2021, requiring no drilling, grinding, or modification to the vehicle’s factory-mounted components

The 8406161-C6103 bracket is designed for hassle-free installation, ideal for truck fleet maintenance teams. It comes with a comprehensive hardware kit that meets Dongfeng OE standards: 5 grade 10.9 high-strength hexagon bolts (with anti-loosening nylon washers), 5 lock nuts, and 1 rubber anti-vibration gasket. Installation requires only standard hand tools (12mm socket wrench) and can be completed by two technicians in 22-28 minutes: align the bracket with the chassis and step mounting points, secure with bolts, and torque to 42±4 N·m (per Dongfeng’s safety specifications). The kit includes a clear installation guide with torque values and alignment marks, reducing errors and ensuring compliance with the truck’s structural safety standards. The bracket’s lightweight design (3.5kg) simplifies handling, while its powder-coated surface resists scratches during installation—maintaining a professional appearance for fleet vehicles