HKS 50003-M35IL Spark Plug SUPER FIRE RACING M35iL for SUBARU WRX STI

Description HKS 50003-M35IL Spark Plug SUPER FIRE RACING M35iL

The HKS SUPER FIRE RACING M35iL spark plug is engineered for high-performance ignition efficiency and durability in both tuned and factory engines. Utilizing advanced materials and precision construction, this plug features a 0.6 mm iridium alloy center electrode and platinum chip-equipped outer electrode, optimized for maximum ignition energy and extended service life. Anti-vibration design and anti-fouling properties make it ideal for demanding environments including high-boost, lean mixtures, and sustained high-load applications such as circuit use. The M35iL delivers superior spark stability, reduced voltage demand, and resistance to carbon deposits.

• 0.6 mm iridium alloy center electrode for enhanced ignition performance
• Platinum chip outer electrode increases durability and firing reliability
• Shortened and tapered outer electrode with anti-vibration construction
• Thermal edge and spark support gap design reduce carbon buildup
• Ideal for high-load, high-boost, and tuned engine conditions

Specifications:

• Electrode Material: Iridium center, platinum chip outer
• Center Electrode Diameter: 0.6 mm
• Heat Range: NGK #7
• Thread Size: 14x26.5 mm
• Wrench Size: 16 mm
• Application: Tuning, circuit, and high-performance street use