The HKS Super Fire Racing M45HL Spark Plug is a high-performance ignition upgrade engineered to deliver stronger, more consistent spark under demanding conditions. Designed for both modified and stock-performance applications, the M45HL offers improved ignition efficiency, durability, and reliability in high-heat, high-load environments.

HKS developed the Super Fire Racing plug series to provide dependable ignition performance in extreme racing conditions while still maintaining compatibility with street-driven engines. The M45HL uses a 0.6mm iridium alloy center electrode to reduce required voltage and improve spark intensity, while the platinum-chip outer electrode enhances durability and long-term performance.

Features

• 0.6mm iridium alloy center electrode for improved ignition performance
• Platinum-chip outer electrode for added durability
• Short-type outer electrode with anti-vibration design
• Thermal Edge design helps reduce carbon deposits
• Spark Support Gap helps prevent carbon buildup and misfires
• Designed for both performance street and racing use

Specifications

• Plug Type: M45HL
• Thread Size: 14mm
• Reach / Hex Size: 12mm x 26.5mm

Fitment Notes

• Suitable for stock and modified performance applications
• Verify heat range and application before purchase

Whether you're maintaining a high-performance street car or preparing for more demanding driving conditions, the HKS Super Fire Racing M45HL spark plug provides the ignition strength and durability needed to keep your engine performing at its best.