Exhaust Brake Chamber Cylinder with EPDM Diaphragm and 125 psi Operating Pressure for ISUZU NKR NPR NQR

The exhaust brake chamber cylinder, carrying OEM numbers 8971086160 and 8-97108616-0, is a pneumatic actuator that controls the exhaust butterfly valve on ISUZU N-series diesel trucks. It is a direct bolt‑on replacement for vehicles powered by 4BE1, 4BD1, and 4HF1 engines, including NKR, NPR, and NQR chassis manufactured between 1985 and 1994.

This single-acting pneumatic cylinder is mounted on the exhaust brake valve assembly. When engaged, compressed air pushes a diaphragm and rod to close a butterfly valve in the exhaust stream, creating back pressure that provides auxiliary braking force—critical for medium‑duty trucks descending steep grades with full payloads.

This ISUZU exhaust brake chamber 8971086160 directly replaces the factory unit in the following configurations:

Additional compatibility extends to early HINO FC models and certain MITSUBISHI CANTER, TOYOTA COASTER, and DYNA platforms sharing the same pneumatic exhaust brake architecture from the 1980s–1990s.

• Direct OE Replacement—Matches original ISUZU mounting bracket hole spacing and clevis pin diameter
• EPDM Diaphragm with heat-resistant formulation rated for temperatures up to 120°C
• Calibrated Return Spring for consistent release and proper valve operation
• Powder‑Coated Steel Housing resists corrosion in harsh environments
• Compatible with 125 psi Air Systems—pressure-tested to 150 psi with documented safety margin
• One Chamber Fills Multiple Applications—covers eight chassis models across three engine families

Full functional test: Random 2–5% of each batch cycled at 120 psi for 500 cycles to measure stroke length consistency and return spring recovery time.

Manufacturer provides a 6‑month warranty against manufacturing defects with certificate of conformance and batch traceability.

• Individual packaging: Sealed in anti‑rust VCI bag, foam‑lined carton
• Carton dimensions: 20 × 15 × 10 cm per unit
• Net weight: approx. 1.2 kg; Gross weight: approx. 1.4 kg
• Master carton: 50 pieces per export carton
• Lead time: 3–7 working days for stock orders; 15–20 days for production orders above 500 pieces
• Minimum order quantity: 1 piece (sample order available)
• Shipping: FedEx, UPS, DHL for samples; sea freight from major Chinese ports

The ISUZU exhaust brake chamber cylinder 8971086160 is a direct‑fit, single‑acting pneumatic actuator for 1985–1994 NKR, NPR, and NQR trucks equipped with 4BE1, 4BD1, or 4HF1 diesel engines. It replaces failed diaphragms and return springs to restore auxiliary braking for downhill operation. EPDM construction resists under‑chassis heat, and powder‑coated steel housing withstands road salt and moisture. One SKU covers eight chassis models across three engine families. ISO 9001 certified with batch traceability and 6‑month warranty.

Order a sample unit today to verify fitment on your ISUZU N‑series chassis—the same chamber fits NKR57, NPR59, and NPR66 trucks alike.