HKS M-Series Super Fire Racing Spark Plug M45HL WRX 15-21 | 50003-M45HL-1

Product Fitment:

2015-2021 Subaru WRX

2013-2016 Scion FR-S

2013-2020 Subaru BRZ

2017-2020 Toyota 86

The HKS M-Series Super Fire Racing Spark Plug is designed for high-output engines requiring superior ignition reliability under increased boost and demanding conditions. Featuring a high-performance iridium center electrode, these plugs offer enhanced ignition efficiency, improved combustion, and strong resistance to carbon buildup. Ideal for tuned street and track vehicles, they’re trusted by performance enthusiasts worldwide.

Note: Sold individually. Be sure to order the correct quantity for your engine.

Features:

• High-performance iridium spark plug for forced induction and high-RPM engines

• Designed to withstand increased cylinder pressure and high boost levels

• Improved ignition performance and throttle response

• Anti-carbon build-up design for cleaner, longer-lasting operation

• Heat range optimized for performance applications
  

• Pre-Gapped to: 0.022

Includes:

• (1) HKS M-Series Super Fire Racing Spark Plug
  Spark plugs are sold individually — price is for one plug.

When tuning for higher power or running increased boost, factory spark plugs can struggle with ignition efficiency and longevity. HKS M-Series plugs are specifically engineered to handle the heat and pressure of performance builds while maintaining a strong, consistent spark and resisting fouling over time.