NGK 5245 Spark Plug

NGK Laser Iridium Spark Plug Overview

The NGK Laser Iridium Spark Plug 5245 is engineered for reliable ignition performance in Mitsubishi Lancer and Subaru WRX STI models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine responsiveness.

• Iridium center electrode tip for enhanced durability
• Taper cut ground electrode tip design
• Copper core center electrode for optimal conductivity
• Standard ground configuration with nickel core material
• Non-removable nut electrical terminal type
• Pre-gap size of 0.024 inches for precise spark delivery
• Flat seat type with 14mm thread diameter and 26.5mm reach
• Hex size of 5/8 inch for standard installation tools
• Manufacturer heat range rating of 7
• Insulator height of 50.50 mm for proper fitment

About the NGK Laser Iridium Spark Plug Line

The Laser Iridium Spark Plug line from NGK is designed to provide consistent ignition performance and long service life. Featuring an iridium center electrode tip, these plugs offer improved wear resistance and stable spark generation. The combination of copper core and iridium tip materials ensures efficient electrical conductivity and combustion, making them suitable for performance-oriented vehicles like the Mitsubishi Lancer and Subaru WRX STI.

Technical Details and Specifications

This NGK spark plug (part number 5245, also referenced as ILFR7H) incorporates a single ground electrode with a taper cut design, which helps optimize spark exposure and combustion efficiency. The nickel core ground electrode balances durability and conductivity, while the copper core center electrode enhances heat dissipation. The flat seat and 14mm thread diameter ensure compatibility with specified engine cylinder heads. The pre-gap of 0.024 inches is factory set to meet OEM requirements, supporting reliable ignition timing and fuel efficiency.

Applications and Problem Solving

• Compatible with Mitsubishi Lancer and Subaru WRX STI models requiring part number 5245
• Addresses misfires caused by worn or damaged spark plugs
• Improves cold start performance and throttle response
• Reduces fouling and electrode wear in high-performance engines
• Helps maintain consistent combustion for smoother engine operation

Installation Notes and Tips

When installing the NGK Laser Iridium Spark Plug 5245, ensure the spark plug gap is checked and adjusted if necessary, although it comes pre-gapped at 0.024 inches. Use a 5/8 inch socket for proper torque application to avoid damage to the flat seat. Confirm compatibility with your vehicle’s engine specifications before installation. It is recommended to replace spark plugs in sets to maintain balanced engine performance.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable ignition and durability. The Laser Iridium Spark Plug 5245 undergoes rigorous testing for heat range, electrode wear, and electrical resistance (5000 ohms) to maintain consistent performance. Warranty coverage details should be confirmed with the vehicle manufacturer or authorized NGK distributor.