A-Premium Iridium Platinum Spark Plugs Pack of 4 for L4 Engines — Fine Wire, 5000Ω Resistor

A-Premium Iridium Platinum Spark Plugs pack of 4 are high-durability fine-wire ignition plugs designed for L4 engines to restore efficient combustion and long service life.

These spark plugs combine an iridium center tip with a platinum core to provide consistent ignition performance across a wide range of compact and mid-size vehicles. Engineered dimensions and a 5000-ohm resistor make them compatible with modern ignition systems while resisting wear under normal driving conditions. The set of four is intended as a direct replacement when the factory part numbers match the vehicle fitment list.

How do these plugs improve starting and throttle response?

Their fine iridium tip lowers required voltage for spark formation and concentrates the spark energy at the gap, promoting cleaner combustion. That can translate to steadier cold starts and smoother throttle transitions without altering your engine management. Performance changes depend on engine condition and tuning.

• Iridium center electrode for concentrated spark delivery
• Platinum core for improved wear resistance
• Consistent 0.040/0.044 inch gap for predictable ignition
• 5000 ohm resistance to suppress electronic interference

Are these A-Premium plugs compatible with my car?

They are designed to match many Japanese and related models; always verify fitment against your OEM reference numbers. The product fits numerous Honda, Acura, Toyota, Lexus, Mazda, Subaru, Scion and Pontiac applications when the listed part numbers correspond. Use the reference numbers and dimensions to confirm correct replacement.

• Reference numbers include LKAR7BIX-11S, LKAR7BIX11S, DILKAR7H11GS, among others
• Compatible with many Civic, Accord, CR-V, Acura ILX/TLX models
• Also fits Toyota Corolla, Prius family, Yaris, Matrix and Scion models
• Compatible with Mazda 3/6/CX series, Subaru Forester/Outback/Impreza and more

What are the key specifications and installation dimensions?

The plugs follow precise mechanical specs so they seat and reach as expected in compatible heads. Their thread diameter, reach, and insulator height match many factory originals, reducing the chance of fitment or heat-management issues when installed correctly. Use a torque wrench and follow vehicle manufacturer torque specs when replacing plugs.

• Center electrode tip: Iridium; center electrode core: Platinum
• Resistance: 5000 ohms for EMI suppression
• Gap size: 0.040 / 0.044 inch; hex size: 0.55 inch
• Insulator height 51.00 mm; reach 26.50 mm; thread diameter 12.00 mm

How long can I expect these spark plugs to last?

Iridium and platinum electrodes extend service life compared with conventional copper plugs, making them a popular choice for long-interval maintenance. A-Premium recommends replacement in the 80,000–100,000 mile range under normal driving conditions. Driving style, fuel quality, and engine condition can shorten or lengthen actual life.

• Engineered for longevity with iridium and platinum tip materials
• Manufacturer suggested replacement: 80,000–100,000 miles
• Inspect plugs sooner if you notice misfires, poor idle, or increased fuel use
• Maintain proper gap and torque at installation for maximum lifespan

Who is this for? These A-Premium iridium platinum spark plugs are suited for owners and mechanics who need a long-lasting, OEM-dimension replacement for four-cylinder (L4) engines found in many compact and mid-size vehicles. Choose this pack if your vehicle’s OEM or aftermarket references match the listed numbers and you want a durable plug with low-voltage ignition characteristics that help maintain smooth starts and steady combustion over long service intervals.