DENSO 5735 Iridium Racing Spark Plug - IU01-27

The DENSO 5735 Iridium Racing Spark Plug is a no-compromise, top-of-the-line performance spark plug engineered specifically for hardcore racing and extreme driving conditions. Designed for serious enthusiasts who demand maximum performance and reliability under the most demanding circumstances.

Advanced Electrode Technology:

• Ultra-fine 0.4mm iridium-rhodium alloy center electrode reduces voltage requirements and enhances firing performance
• 100% pure platinum 0.8mm ground electrode provides exceptional wear resistance and reduces melting risk during harsh racing conditions
• 360-degree laser welded construction for ultimate durability in extreme environments
• Patented self-cleaning electrode design prevents fouling

Racing-Grade Construction:

• Special hardened insulator 20% stronger than standard plugs for hardcore racing applications
• Five-rib insulator design prevents flashover under high boost and compression
• Purified alumina powder insulator delivers exceptional strength and thermal conductivity
• Silicone oil coated insulator repels moisture and carbon buildup
• Copper-glass seal bonds center electrode and insulator for gas-tight seal

Performance Features:

• Handles extreme compression and boost levels with ease
• Machine rolled threads prevent seizing or cross-threading during installation and removal
• 100% pre-fired for assured quality
• Superior ignition performance reduces misfires under all racing conditions

The iridium alloy used in these plugs is six times harder and eight times stronger than conventional platinum, making them ideal for high-performance ignition systems and special racing applications. Also known as DENSO part number IU01-27.