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Vehicle Info NeededDENSOPART NUMBER: 313-5749
Iridium Racing Spark Plug Racing Plug
$3699
Ships on Sep 17, 2026
Lowest Price GuaranteeIridium Racing Plugs
- Iridium Racing Spark Plug
- Racing Plug
Features - 5/8" Hex
- 0.4mm Iridium Tipped Laser Welded Fine Wire Center Electrode
- 0.8mm Fine Wire Pure Platinum Ground Electrode
- Special Hardened Insulator is 20% Stronger for Hard Core Racing Applications
- Patented Self Cleaning Electrode Design
- Silicone Oil Coated Insulator to Repel Moisture and Carbon Buildup
- Handles Extreme Compression and Boost Levels
- Machine Rolled Threads Prevent Seizing or Cross Threading During Installation and Removal
- 100% Pre-Fired to Assure the Highest Quality Possible
- Purified Alumina Powder Insulator Provides Exceptional Strength and Thermal Conductivity
- Five Rib Insulator Prevents Flashover
- Copper-Glass Seal Bonds Center Electrode and Insulator for a Gas-Tight Seal
Part TypeSpark Plug
BrandDENSO
Package Height1.1
Package Width1.3
Package Length4.1
Weight0.18 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part Number5749
Package Qty1
Package TypeEA
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