NGK Laser Iridium Spark Plugs – Heat Range #7 (Set of 4) – Subaru WRX / STI / Liberty GT / Forester XT EJ25

Overview
NGK Laser Iridium Spark Plugs in Heat Range #7 are the perfect upgrade for Subaru EJ25 engines found in the WRX, STI, Liberty GT, and Forester XT. Featuring a fine-wire iridium centre electrode and a platinum ground electrode, these plugs provide superior ignition efficiency, improved throttle response, and long-lasting durability compared to conventional plugs. Ideal for both standard and mildly tuned engines, they deliver consistent performance under demanding conditions.

Key Features

• Heat Range #7 – suitable for performance and tuned applications
• Fine-wire iridium centre electrode for enhanced ignitability
• Platinum ground electrode for extended service life
• Improved throttle response and fuel efficiency
• Exceptional durability under high combustion pressures
• OEM quality, reliability, and fitment

Technical Specifications

• Type: NGK Laser Iridium
• Heat Range: #7
• Set: 4 spark plugs
• Thread Size: M14 x 1.25
• Reach: 19mm
• Hex Size: 16mm
• Resistor: Yes

Vehicle Compatibility

• Subaru WRX EJ25
• Subaru WRX STI EJ25
• Subaru Liberty GT EJ25
• Subaru Forester XT EJ25

Notes
Recommended for lightly modified or tuned EJ25 engines where a colder plug is required to maintain optimal combustion temperatures and prevent detonation. Always check vehicle-specific requirements before installation.