350z DE HKS Super Fire Racing Iridium Spark Plug

Specifications:

- Electrode Tip Material: Iridium
- Spark Plug Gap: Pre-gapped
- Wrench Diameter: 0.630"
- Thread Diameter: 0.551"
- Thread Length: 1.043"
- Heat Range: 7
- Type: Long Reach

Features:

- 0.6mm Iridium Alloy Center Electrode
- Iridium Alloy Center Electrode reduces voltage requirement as well as improving ignition performance and durability
- Outer Electrode with Platinum Chip
- The Outer Electrode incorporates a square platinum chip which improves urability, and when combined with the iridium center electrode boosts ignition performance
- The Outer Electrode features a shortened tip design and tapered shape while
- Maintaining the necessary space for proper ignition
- Short Type Outer Electrode (Anti-Vibration)
- The outer electrode has been shortened and engineered with the ideal shape to decrease weight for resistance against vibration. This anti-vibration design improves longevity of the outer electrode
- Thermal Edge
- After long idling or various combustion conditions carbon buildup can occur causing misfires. The Thermal Edge of the ceramic insulator will discharge to help decrease carbon deposits
- Spark Support Gap
- Discharges will occur in the Spark Support Gap (space between the tip of insulator and the base of the outer electrode) to help prevent carbon buildup

Special Design RE-type for Rotary Engines. Rotary engines reciprocating design have a different mechanism and combustion condition. RE-type spark plugs are specially designed to meet the different requirement for rotary engines. The straight shape platinum outer electrode enables reliable ignition performance.