Bentley Turbo R 1991, Nickel Spark Plug by NGK®. These products by NGK are the plugs of choice in millions of vehicles designed to provide consistent performance while ensuring OE quality, fit, and function. They are manufactured with a solid copper core for superior conductivity and heat dissipation, and a triple-gasket sealing process, which eliminates the possibility of combustion gas leakage through the shell.
|Center Electrode Tip Material: Nickel|
|Thread Size: 0.551"|
|Thread Reach: 0.75"|
|Hex Size: 0.625"|
|Ground Electrode Quantity: 1|
|Ground Electrode Material: Nickel|
|Spark Plug Seat Style: Flat|
|Heat Range: 5|
|Longevity: 30k Miles|
|Thread Diameter: 14 mm|
|Overall Height: ISO|
|Resistance: 5 kOhm|
|Insulator Height: 50.50 mm|
|Center Electrode Core Material: Copper Core|
|Ground Configuration: Standard|
|Ground Electrode Core Material: Nickel Core|
|Ground Electrode Tip Design: Standard|
- Designed for consistent performance
- Meet OE quality, fit, and function
- Manufactured using triple-gasket sealing process to prevent leakage through the shell
- Alumina silicate insulator for strength and optimal heat transfer
- Solid-copper core for a more powerful spark with less firing voltage
- Cold-rolled threads for easier removal and installation
- Corrugated ribs eliminate misfire causing “flashover”
- Corrosion resistant zinc chromate plating for maximum protection
- Provide superior durability
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 performance, 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.
These products are adequately protected from combustion gas leaking through the shell thanks to triple-gasket sealing and built with a solid-copper core that produces a more powerful spark with less firing voltage, while most other spark plugs on the market feature only two seals and use a "copper coated" center core. 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. In addition, the product is zinc chromate coating double-dipped using exclusive NGK technology for maximum corrosion protection.
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.