Front Disc Brake Rotor 324mm Diameter Vented Design High-Carbon Gray Iron for ISUZU NQR71 4HG1 Truck

The front disc brake rotor carrying OEM numbers 8-97387229-0 and 8973872290 is a direct replacement for the original brake disc on ISUZU NQR71 series medium‑duty trucks powered by the 4HG1 4.3L diesel engine. This rotor is part of the front hydraulic disc brake system, which replaced earlier drum brakes on later NQR71 chassis (approximately 1994-2002 model years).

The NQR71 has a gross vehicle weight rating (GVWR) of up to 9,500 kg, placing high thermal demands on the front brakes during repeated stops or downhill descents. The disc brake rotor converts kinetic energy into heat through friction with the brake pads. Its vented design (two friction surfaces separated by cooling vanes) dissipates heat faster than a solid rotor, reducing the risk of brake fade - a condition where overheated pads lose friction coefficient.

This rotor has an outer diameter of approximately 324 mm and a thickness of 28-30 mm (new), matching the factory NQR71 specification. It is cast from high‑carbon gray iron (G3000 or G3500 grade), which provides good thermal conductivity, wear resistance, and resistance to judder (thickness variation). The rotor is machined with a precision‑ground friction surface (roughness Ra 1.5-3.0 µm) and a rust‑preventive coating on the non‑friction areas (hub and vanes) to protect against corrosion during storage and initial service.

A warped, cracked, or worn‑below‑minimum‑thickness rotor causes brake pedal pulsation (judder), reduced stopping power, and increased stopping distances. This replacement rotor restores factory braking performance, eliminates pedal vibration, and extends pad life by providing a flat, consistent wear surface.

This ISUZU NQR71 front disc brake rotor 8-97387229-0 directly replaces the factory rotor in the following configurations:

This rotor is also compatible with ISUZU ELF (Japanese domestic) models that were factory‑equipped with front disc brakes, as well as certain GMC/Chevrolet W‑series trucks (rebadged Isuzu) from the same era.

Each batch of the ISUZU front disc brake rotor 8-97387229-0 undergoes rigorous quality control:

The facility holds ISO 9001:2015 certification. A certificate of conformance (COC) with batch material analysis is available for wholesale orders.

• Individual packaging: Sealed in anti‑rust VCI bag, foam‑lined carton
• Carton dimensions: 35 × 35 × 12 cm per rotor
• Net weight: 12-14 kg; gross weight (with packaging): 14-16 kg
• Master carton: 4-6 units per export carton (palletizable)
• Lead time: 5-10 working days for stock orders; 20-25 days for production orders above 200 pieces
• Minimum order quantity: 2 pieces (one axle set - sample order available)
• Shipping methods: FedEx, UPS, DHL freight for small quantities; sea freight (LCL/FCL) for pallet quantities
• Ports: Shanghai, Ningbo, Guangzhou

For workshops performing a full front brake service, matching brake pads (with wear sensors) and caliper hardware kits for the NQR71 are also available.