NGK 4172 Spark Plug

Reliable Ignition with NGK Standard Spark Plug 4172

The NGK Standard Spark Plug 4172 is engineered to deliver consistent ignition performance for a variety of vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 5000 ohms for stable electrical flow
• Low angle ground electrode tip design for optimized spark exposure
• Slant ground configuration enhancing ignition efficiency
• Nickel ground electrode core and tip for durability
• Copper center electrode core for excellent conductivity
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of .032 inches for precise spark gap
• Single ground electrode with a 13/16 inch hex size for easy installation
• Flat seat type and .75 inch reach for proper fitment
• Manufacturer heat range of 8 suitable for moderate engine temperatures
• Insulator height of 55.00 mm and 14.00 mm thread diameter

About the NGK Standard Spark Plug Line

The NGK Standard Spark Plug line is designed to meet OEM specifications for a wide range of vehicles, providing dependable ignition performance and durability. The 4172 part number belongs to this line, ensuring compatibility and consistent operation in secondary ignition systems where reliable spark delivery is critical.

Technical Details and Performance

This spark plug features a copper core center electrode that enhances electrical conductivity, paired with a nickel ground electrode designed with a low angle tip and slant configuration to optimize spark exposure and combustion efficiency. The 5000 ohm resistance helps reduce radio frequency interference, protecting vehicle electronics. The flat seat and .75 inch reach ensure proper sealing and fitment in compatible engines. The pre-gap of .032 inches is set to factory specifications, supporting reliable ignition without additional adjustment.

Applications and Problem Solving

• Restores engine misfire issues caused by worn or fouled spark plugs
• Improves cold start performance in vehicles requiring heat range 8 plugs
• Reduces ignition system electrical noise with 5000 ohm resistance
• Maintains consistent combustion for smoother engine operation
• Prevents poor fuel economy linked to inefficient spark delivery

Installation Notes and Tips

Ensure the spark plug is installed with the correct torque to avoid damage to the threads or improper sealing. The 13/16 inch hex size allows for standard spark plug socket use. Verify the .75 inch reach is compatible with your engine to prevent interference with piston or valve components. The pre-gap is factory set at .032 inches, so no additional gapping is typically required before installation.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Standard Spark Plug 4172 undergoes rigorous testing to comply with OEM specifications. Warranty coverage details should be confirmed with the vehicle manufacturer or parts distributor.