Dongfeng GX Right bumper support rod assembly 8406322-C6200

Constructed from a high-performance blend of seamless 40Cr steel (support rod) and ductile cast iron (QT500-7 grade mounting brackets), the 8406322-C6200 assembly balances strength, toughness, and impact resistance. The seamless steel rod exhibits a tensile strength of ≥700 MPa and bending resistance that prevents permanent warping under lateral forces (e.g., curb scrapes or debris impacts). The QT500-7 cast iron brackets offer enhanced toughness, with a notched Izod impact strength of 18 J/cm² at 23°C—avoiding cracking even in sub-zero temperatures (-35°C). This material combination extends the assembly’s service life to over 9 years, outperforming aluminum or low-grade steel alternatives by 50% and making it ideal for trucks operating in construction, mining, or coastal environments

Exclusively tailored for Dongfeng GX heavy-duty trucks (including cargo, long-haul, and dump variants), the 8406322-C6200 assembly adheres strictly to advanced OE specifications. Manufactured using CNC precision machining for the support rod (tolerance: ±0.08mm) and investment casting for the brackets (surface roughness: Ra 3.2μm), it matches every mounting hole, contour, and connection point of the GX’s right bumper and frame. The assembly includes 5 pre-drilled M10 threaded holes (depth: 14mm) that align perfectly with the bumper’s reinforcement ribs and frame rails, eliminating gaps that cause rattling or premature wear. It is fully compatible with all Dongfeng GX models produced since 2022—including those with upgraded bumper guards or auxiliary lighting—requiring no drilling, grinding, or modification to the vehicle’s original structure

To combat rust and degradation from road salt, rain, mud, and industrial debris, the 8406322-C6200 assembly undergoes a four-step anti-corrosion process. First, a zinc phosphate pretreatment (15-17μm thick) creates a porous base that enhances coating adhesion. Second, an electrophoretic primer (22-25μm thick) provides uniform coverage—even in hard-to-reach bracket crevices—blocking moisture infiltration. Third, an epoxy mid-coat (18-20μm thick) adds an extra barrier against chemicals. Finally, a matte-black polyester powder coating (85-95μm thick) meets ISO 10289 standards, passing 1500-hour neutral salt spray tests without red rust formation. This protection ensures the assembly maintains structural integrity and appearance in coastal (saltwater), snowy (road salt), or industrial (chemical exposure) areas

The 8406322-C6200 assembly is designed for efficient, error-free installation—ideal for fleet maintenance teams. It includes a complete OE-spec hardware kit: 5 grade 12.9 high-strength bolts (with anti-loosening nylon washers), 5 lock nuts, and 3 rubber anti-vibration gaskets (shore hardness: 60±5A) that reduce metal-to-metal friction. Installation requires only standard hand tools (14mm socket wrench) and can be completed by two technicians in 25-30 minutes: align the assembly with the bumper and frame mounting points, secure bolts to 50±5 N·m (per Dongfeng’s torque specifications), and verify alignment. The kit also includes a color-coded installation guide with torque values and reference marks, minimizing errors. The assembly’s lightweight design (3.1kg) simplifies handling, while its powder-coated surface resists scratches during installation—preserving a professional fleet appearance