NGK 5545 Spark Plug

NGK Iridium IX Spark Plug Overview

The NGK Iridium IX Spark Plug 5545 is engineered for high-performance ignition in select Lamborghini models. Designed to deliver reliable ignition and efficient combustion, this spark plug is compatible with Lamborghini Countach, Diablo, and LM002 vehicles.

• Iridium center electrode tip for enhanced durability and ignition
• Taper cut ground electrode tip design for improved spark exposure
• Copper core center electrode for optimal conductivity
• Standard ground configuration with a single nickel ground electrode
• Removable nut electrical terminal type for ease of installation
• Pre-gap size of .036 inches for precise spark gap
• Flat seat type with 12mm thread diameter and .75 inch reach
• Hex size 18mm for standard wrench compatibility
• Manufacturer heat range 9 suitable for high-performance engines
• Insulator height of 50.00 mm for proper fitment

Iridium IX Spark Plug Product Line Details

The Iridium IX Spark Plug line by NGK is designed to provide enhanced ignition performance and durability through the use of iridium-tipped center electrodes. This technology allows for a finer electrode that improves spark efficiency and wear resistance. The 5545 part number within this line incorporates a copper core center electrode to maintain excellent electrical conductivity, supporting consistent engine performance in Lamborghini vehicles.

Technical Description and Compatibility

This NGK spark plug features a taper cut ground electrode tip and a single nickel ground electrode, which together optimize spark exposure and combustion efficiency. The removable nut electrical terminal type facilitates straightforward installation and maintenance. With a pre-gap size of .036 inches and a flat seat design, the 5545 spark plug ensures proper sealing and spark gap consistency. Its 12mm thread diameter and .75 inch reach are tailored for the ignition systems of Lamborghini Countach, Diablo, and LM002 models, making it a precise replacement part.

Applications and Problem Solving

• Restores reliable ignition in Lamborghini Countach, Diablo, and LM002 engines
• Addresses misfires caused by worn or damaged spark plugs
• Improves fuel efficiency through consistent spark delivery
• Reduces engine hesitation and rough idling
• Supports stable combustion under high-performance conditions

Installation Notes and Tips

• Verify compatibility with Lamborghini Countach, Diablo, or LM002 before installation
• Use an 18mm socket wrench to install or remove the spark plug
• Ensure the spark plug gap is set to .036 inches if adjustment is needed
• Apply anti-seize compound on threads if recommended by vehicle manufacturer
• Tighten to manufacturer torque specifications to avoid damage

Quality Assurance and Warranty

NGK spark plugs, including the Iridium IX 5545, are manufactured to meet strict quality standards for durability and performance. The use of iridium and copper materials ensures long service life and consistent ignition. While specific warranty details may vary, NGK products typically come with manufacturer-backed quality assurance to support reliable operation in compatible Lamborghini models.