DENSO 5731 Iridium Racing Spark Plug - IXU01-27

The DENSO 5731 IXU01-27 Iridium Racing Spark Plug is a premium performance spark plug engineered for serious enthusiasts and hardcore racing applications. This no-compromise racing plug combines cutting-edge materials with advanced design to deliver maximum ignition performance under the most demanding conditions.

Advanced Iridium Technology:

• Ultra-fine 0.4mm iridium alloy center electrode reduces voltage requirements and greatly improves ignition performance
• Iridium is 6x harder and 8x stronger than platinum for exceptional durability
• Laser-welded fine wire center electrode ensures reliable connection under extreme conditions
• 100% platinum 0.8mm ground electrode with U-groove design reduces wear under severe driving conditions

Racing-Grade Construction:

• Special hardened purified alumina powder insulator provides 20% greater strength for hardcore racing applications
• Enhanced thermal conductivity manages extreme heat more effectively
• Tapered ground electrode design improves firing performance by reducing quenching
• U-groove ground electrode creates a larger, brighter flame kernel for more complete combustion
• 5K Ohm monolithic resistor blocks electrical noise that may affect electronic devices

Technical Specifications:

• Thread Size: 12mm x 1.25mm pitch
• Thread Reach: 19mm (0.750")
• Hex Size: 16mm (5/8")
• Seat Type: Gasket seat
• Gap: 0.6mm (0.024")
• Heat Range: 27
• Tip: Non-projected
• Terminal Type: Removable nut
• Resistor: Yes (5K Ohm)

The IXU01-27 features a removable terminal and comes in durable, reusable packaging. This racing spark plug is designed to deliver superior ignition performance during acceleration and high-RPM operation, helping unlock additional horsepower and improved throttle response for modified engines and racing applications.