4JJ1 Pre DPF High Flow Nozzle Kit includes one High Flow Nozzle Kit designed specifically for Isuzu 4JJ1 Pre DPF diesel engines.
Engineered for enhanced fuel delivery and atomisation, this upgrade improves throttle response, power output, and overall engine performance—making it ideal for tuned or modified applications.

Each nozzle is precision-machined to OEM-level tolerances, ensuring a perfect spray pattern and reliable performance. The kit is a direct-fit replacement compatible with factory injector bodies and includes all required hardware for installation.

Professional installation and injector calibration are recommended. Not suitable for DPF-equipped engines.

Kit Contents

• 4x High Flow Nozzles (with test results & matching codes)
• 4x Cap Nut Bolts
• 4x Injector Hold Down Bolts
• 4x Washers & O-Rings
• Complete washer, clip, and seal set for installation

Note: Supplied as a full set for 4JJ1 Pre DPF engines.

Alternative Part Numbers

N/A – Performance upgrade component (verify compatibility before installation)