Iridium IX™ Spark Plug (7149) by NGK®. Designed for performance enthusiasts who want extreme ignitability, improved throttle response and superior anti-fouling, these spark plugs are a great option for modified engines and appropriate replacement for OE spark plugs, where recommended. With a 0.6 mm laser welded iridium tip and taper cut ground electrode, these plugs provide more area for flame expansion for quicker starts, improved performance, and better efficiency.
|Center Electrode Tip Material: Iridium|
|Thread Size: 0.551"|
|Thread Reach: 0.75"|
|Hex Size: 0.812"|
|Ground Electrode Quantity: 1|
|Ground Electrode Material: Nickel|
|Spark Plug Seat Style: Flat|
|Heat Range: 4|
|Longevity: 40-50k Miles|
|Shape: Taper Cut|
|Thread Diameter: 14 mm|
|Overall Height: ISO|
|Resistance: 5 kOhm|
|Insulator Height: 56 mm|
|Center Electrode Core Material: Copper Core|
|Ground Configuration: Standard|
|Ground Electrode Core Material: Nickel Core|
|Ground Electrode Tip Design: Taper Cut|
- Designed for outstanding acceleration, high fuel efficiency, and durability
- Ensure a consistently stable spark
- Extremely high melting point, perfect for today’s high-tech, high-performance engines
- Extremely resistant to heat, corrosion and electrical wear
- Match OE fit and quality
- 0.6 mm laser welded iridium tip
- Tapered ground electrode
- Manufactured using triple-gasket sealing process to prevent leakage through the shell
- Alumina silicate insulator for strength and optimal heat transfer
- Cold-rolled threads for easier removal and installation
- Corrugated ribs eliminate misfire causing “flashover”
- Trivalent metal plating
- Last 40 to 50 thousand miles
Designed to ignite the air/fuel mixture within the combustion chamber, a spark plug has to withstand the high temperature and combustion pressure within the engine. If everything operates properly, the engine runs efficiently providing optimal power, maximum fuel economy and the lowest exhaust emissions due to effective combustion. Spark plugs are available in different heat ranges and thread sizes to suit engine requirements. There are several factors - such as thread reach, thread diameter, the insulator nose projection, and whether the spark plug incorporates a gasket or is of the conical type - to consider when choosing the correct spark plug for your needs. When buying these spark plugs by NGK, you are guaranteed that they will meet or exceed OE quality and performance.
Designed to provide maximum performance and extremely long service life, these spark plugs are a great option for modified engines and appropriate replacement for OE nickel alloy and single precious metal spark plugs, where recommended. They feature a 0.6mm laser welded iridium center electrode tip that is extremely resistant to heat, corrosion, and electrical wear. The reduced mass of the fine wire center electrode tip and taper cut ground electrode provide more area for flame expansion, resulting in quicker starts, improved performance, and better efficiency.
The products are adequately protected from combustion gas leaking through the shell thanks to triple-gasket sealing, while most other spark plugs on the market feature only two seals. The spark plugs also feature the alumina silicate insulator that is virtually pure to insure dielectric and physical strength, as well as heat transfer away from the tip for maximum performance. To eliminate “flash over,” which can cause misfiring, these products are built with corrugated ribs and feature cold-rolled threads to prevent damage to the cylinder head and make installation and removal easier. The products also feature trivalent metal plating for superior anti-corrosion and anti-seizing properties.
Starting with a single product in 1936, NGK® became the world leader in innovation, technology, and premium quality in the manufacture of spark plugs for virtually every automotive manufacturer in the world. NGK`s extraordinary growth can be attributed to a philosophy of manufacturing the product where it is going to be used, which means a substantial number of products sold in the USA are made in America. One of the benefits of such a policy is the ability to work closely with manufacturers in developing products tailored specifically to their needs. Today with ISO 14001 and ISO/TS 16949 certification as well as state-of-the-art manufacturing and inventory facilities, NGK provides customers with the finest spark plugs and complimentary products.