How do I install SPARK PLUGs correctly? It is essential to tighten a SPARK PLUG to the specified turning angle or torque setting. First, screw in the plug finger tight until the gasket meets the cylinder head. Then seat the plug/gasket with a torque or turning angle wrench as specified in the chart below. This is very important, as excessive tightening of a SPARK PLUG can cause breakage of the metal…

ARE SPECIAL PLUGS NECESSARY ON A MODIFIED ENGINE? It depends on the modifications. The term “modified” refers to those engines with bolt-on components that may or may not raise the total compression ratio of the engine. These can include turbocharging, supercharging, nitrous oxide injection, smaller-chambered cylinder heads, free-flowing cylinder heads, modified pistons, change of induction components…

DO I NEED TO SET THE “GAP” WHEN INSTALLING A NEW SET OF PLUGS? Maybe. A SPARK PLUG part number might fit hundreds of different engines from many different manufacturers. Although the NGK factory will set the gap to a preselected setting, this may not be the right gap for your particular engine. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power,…

WHY ARE THERE DIFFERENT HEAT RANGES? It is a common misconception that SPARK PLUGs create heat. They don’t. the SPARK PLUG heat range only indicates the rate at which the SPARK PLUG dissipates its firing end heat to the engine. Selecting a SPARK PLUG with the proper heat range will ensure that the tip will maintain a temperature high enough to prevent fouling, yet be cool enough to prevent pre-ignition.…

Iridium IX® The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX® ideal for the performance enthusiast. Iridium’s extremely high melting point is perfectly suited to today’s high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability. Fine iridium tip ensures high durability and a consistently stable spark Trivalent metal…

Ruthenium HX High Ignitability SPARK PLUGs bring the most advanced SPARK PLUG technology to the automotive aftermarket, delivering better efficiency and power for today’s engines. The NGK Difference DFE & PSPE® tip designs Superior oxidation resistance Advanced high ignitability technology Enhanced blistering/anti-peeling The Latest Innovation in Precious Metal SPARK PLUGs. Modern engines…

With a full line of SPARK PLUGs, coils, and wire sets, NGK covers 95% of import and domestic vehicles on the market.   The world’s largest OE oxygen sensor manufacturer now offers a full line of premium technical sensors for the aftermarket, featuring more than 6,800 SKUs.

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