NGK 4390 Spark Plug Wire Set

Reliable Ignition Performance for Subaru Impreza

The NGK Spark Plug Wire Set 4390 is designed specifically for Subaru Impreza models, ensuring precise fitment and optimal ignition performance. Featuring high-quality silicone insulation and noise suppression, this spark plug wire set supports efficient engine operation and reduces electrical interference.

Key Features of NGK Spark Plug Wire Set 4390

• Insulation Color: Blue for easy identification
• Durable silicone insulation material for heat resistance
• Noise suppression technology to minimize electromagnetic interference
• Magnesium core with variable pitch for consistent spark delivery
• Specific fitment tailored for Subaru Impreza vehicles
• Insulation outside diameter of 7.00 mm for reliable protection
• Part Number Rc-fx55, Stock Number 4390

About the NGK Spark Plug Wire Set Product Line

The NGK Spark Plug Wire Set line focuses on delivering ignition wire sets engineered for specific vehicle applications. This ensures compatibility and performance by using materials like silicone insulation and advanced core designs such as magnesium variable pitch cores. The 4390 set exemplifies this approach by combining noise suppression and durable construction tailored for Subaru Impreza models.

Detailed Product Description

This NGK Spark Plug Wire Set 4390 features a silicone insulation that withstands high temperatures and environmental stress, maintaining wire integrity over time. The magnesium core with variable pitch enhances spark energy transfer, improving ignition reliability. Noise suppression reduces radio frequency interference, which can affect vehicle electronics. The blue insulation color aids in quick identification during maintenance. Designed specifically for Subaru Impreza, this set ensures a precise fit and optimal engine performance.

Common Issues Addressed by This Spark Plug Wire Set

• Misfires caused by worn or damaged ignition wires
• Electrical noise interfering with vehicle electronics
• Reduced engine performance due to poor spark delivery
• Heat-related wire degradation in the engine bay
• Fitment problems with generic ignition wire sets

Installation Notes and Tips

When installing the NGK Spark Plug Wire Set 4390, ensure the engine is cool to avoid burns. Replace wires one at a time to maintain correct firing order. Verify that each wire is securely connected to both the spark plug and ignition coil terminals. Inspect boots and connectors for damage before installation. Proper routing away from hot engine components will extend wire life.

Quality Assurance and Warranty

NGK maintains strict quality control standards for its ignition components. The NGK Spark Plug Wire Set 4390 is manufactured to meet OEM specifications for Subaru Impreza models. While specific warranty details are not provided here, NGK products typically come with manufacturer-backed warranties covering defects in materials and workmanship.