HKS 50003-M50HL Spark Plug 10 for NISSAN GT-R (R35) / SUBARU BRZ (ZС6) / TOYOTA GT86 (ZN6)

Description Description HKS 50003-M50HL HL Type Spark Plug M12 Long Reach HEX14 for Toyota 86 / Subaru BRZ / Nissan GT-R (R35)

The HKS M50HL spark plug represents a breakthrough in ignition technology for high-performance engines, offering a heat range equivalent to NGK #10 in a compact M12 long-reach, 14mm HEX configuration. Developed for tuned or factory engines operating under high load, elevated RPM, or boosted conditions, this plug enhances ignition reliability, combustion efficiency, and overall durability.

• Iridium alloy center electrode (0.6 mm) lowers voltage requirement while increasing ignition stability and lifespan
• Outer electrode with square platinum chip improves ignition consistency and mechanical strength
• Short, tapered outer electrode minimizes weight and resists vibration for improved durability
• Thermal Edge design reduces carbon buildup from extended idling or incomplete combustion
• Spark Support Gap aids in carbon deposit reduction by discharging between insulator and electrode base
• Ideal for high boost, lean air-fuel mixtures, and aggressive tuning conditions

Specifications:

• Spark Plug Type: HL Type
• Thread Size: 12x26.5 mm
• Wrench Size: 14 mm
• Heat Range: NGK #10
• Length: 9.5 cm
• Width: 2.5 cm
• Height: 2 cm
• Weight: 0.05 kg