Champion 9408 Spark Plug

Champion Iridium Spark Plug 9408 Overview

The Champion Iridium 9408 spark plug is engineered for reliable ignition performance in select Dodge, Genesis, Hyundai, and Mercedes-Benz vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability
• Platinum ground electrode core material with J gap design
• Non-removable nut electrical terminal type
• Pre-gap size of 0.041 inches (1.05 mm) for optimal spark
• Flat seat type with a thread diameter of 0.470 inches (12 mm)
• Resistor type spark plug to reduce electrical noise
• Hex size of 0.625 inches (16 mm) for installation
• Manufacturer heat range rating of 8

Detailed Features and Specifications

The Champion Iridium 9408 spark plug features a center electrode tip made from iridium, a material known for its high melting point and wear resistance, which contributes to longer service life and stable ignition. The ground electrode incorporates a platinum core with a J gap design, enhancing spark efficiency and reducing electrode wear. This spark plug includes a non-removable nut electrical terminal type, ensuring secure connection and electrical conductivity.

With a pre-gap size of 0.041 inches (1.05 mm), the spark plug is set to deliver optimal spark energy for efficient combustion. The flat seat type and 0.470-inch (12 mm) thread diameter provide compatibility with a range of engines, while the resistor built into the plug helps minimize radio frequency interference. The hex size of 0.625 inches (16 mm) allows for straightforward installation using standard tools. The heat range rating of 8 indicates suitability for engines requiring a colder plug to prevent pre-ignition.

Champion Iridium Product Line

The Champion Iridium line is designed to offer enhanced ignition performance and durability through the use of iridium and platinum materials. This product line focuses on delivering consistent spark delivery and extended service intervals, making it suitable for modern engines in vehicles such as the Mercedes-Benz C-Class and Hyundai Genesis models. The 9408 spark plug exemplifies these qualities with its precise electrode design and robust construction.

Compatible Vehicles and Applications

• Dodge Sprinter 2500 and 3500 models
• Genesis G80 and Equus
• Hyundai Genesis
• Mercedes-Benz C230, C280, C300, C350, CL550, CLK350, CLK550, CLS550, E280, E350, E550, G550, GL450, GLK350, ML350, ML450, ML550, R350, R550, S350, S400, S450, S550, SL550, SLK250, SLK280, SLK300, SLK350

Common Issues Addressed by Champion Iridium 9408

• Misfiring or rough engine idle
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting the engine
• Increased exhaust emissions
• Premature electrode wear in high-performance engines

Installation Notes and Tips

Before installation, verify the spark plug gap matches the vehicle manufacturer’s specifications; the Champion Iridium 9408 comes pre-gapped at 0.041 inches (1.05 mm). Use a torque wrench to tighten the spark plug to the recommended torque to avoid damage to the threads or seat. The 0.625-inch (16 mm) hex size allows for easy access in most engine configurations. Ensure the ignition system is off and the engine is cool before replacing spark plugs.

Quality Assurance and Warranty

Champion spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Champion Iridium 9408 spark plug undergoes rigorous testing for heat range, electrode wear, and electrical resistance. While specific warranty details may vary, Champion products typically include coverage against manufacturing defects. Consult product documentation or the vehicle service manual for warranty and replacement guidelines.