Sold as a set of 6 Spark Plugs:

Heat Rage #8 for Forced Induction Applications, VQ35HR VQ37VHR VR38DETT - Nissan 370Z GT-R / Infiniti G35 G37 Q40 Q60

Designed specifically for the performance enthusiast. Iridium IX® offers extreme ignitability, improved throttle response and superior anti fouling.

• Fine Iridium tip ensures high durability and a consistently stable spark
• Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
• Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties
• Outstanding acceleration, high fuel efficiency and durability
• Ultimate design, technology and performance.
• 0.6 mm laser welded iridium tip
• Iridium allow is extremely durable to heat, corrosion and electrical wear.
• Tapered ground electrode to minimize "Quenching Effect"