NGK 7355 Spark Plug

Reliable Ignition Performance for GM and Chrysler Vehicles

The NGK Iridium IX Spark Plug 7355 is engineered to deliver consistent ignition and improved combustion for a range of Buick, Cadillac, Chevrolet, Chrysler, Dodge, Oldsmobile, and Pontiac models. Designed with durable materials and precise specifications, this spark plug supports efficient engine operation and longevity.

• Iridium center electrode tip for enhanced durability and ignition
• Copper core center electrode for optimal conductivity
• Taper cut ground electrode tip with nickel core material
• Standard ground configuration with a single ground electrode
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.040 inches for precise spark delivery
• Flat seat type with 14mm thread diameter and 0.375 inch reach
• Hex size of 13/16 inch for easy installation
• Manufacturer heat range rating of 5 for balanced heat dissipation
• Insulator height of 55.00 mm for proper fitment

About the NGK Iridium IX Spark Plug Line

The Iridium IX Spark Plug line from NGK is designed to provide improved ignition performance and longer service life compared to conventional spark plugs. Featuring an iridium center electrode tip, these plugs offer enhanced wear resistance and stable spark generation, which is particularly beneficial for vehicles requiring precise ignition timing and efficient combustion. The 7355 part number is part of this line, combining iridium technology with a copper core for reliable conductivity and durability.

Technical Details and Compatibility

This spark plug is compatible with a wide range of GM and Chrysler vehicles, including models such as the Chevrolet Camaro, Corvette, Impala, and Silverado, as well as the Dodge Challenger, Charger, and Ramcharger. It fits vehicles with a 14mm thread diameter, 0.375 inch reach, and flat seat type. The taper cut ground electrode and nickel core material contribute to consistent spark performance, while the non-removable nut terminal ensures a secure electrical connection.

Common Applications and Problem Solving

• Restores engine misfire issues caused by worn or fouled spark plugs
• Improves cold start performance in Buick, Cadillac, and Pontiac models
• Enhances fuel efficiency and reduces emissions in Chevrolet and Dodge vehicles
• Maintains stable ignition under high-performance conditions in muscle cars like the Camaro and Charger
• Supports smooth idling and acceleration in older models such as the Oldsmobile Cutlass and Pontiac Firebird

Installation Notes and Tips

Before installation, verify the spark plug gap is set to the recommended 0.040 inches. Use a torque wrench to tighten the spark plug to the manufacturer’s specifications to avoid damage to the threads or seat. The 13/16 inch hex size allows for standard spark plug socket compatibility. Ensure the ignition system is off and the engine is cool before replacing spark plugs to prevent injury or damage.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Iridium IX Spark Plug 7355 undergoes rigorous testing for heat range, electrode wear, and electrical resistance (5000 ohms) to maintain consistent ignition. While specific warranty details may vary, NGK products typically come with a limited warranty against manufacturing defects.