NGK Laser Iridium Spark Plug – SILZKR7E8EG | Box of 4 | Honda K-Series | NGK93655

Box of 4 plugs. Confirm fitment against your vehicle’s OEM NGK plug specification before ordering — use your VIN or OEM part number to verify SILZKR7E8EG is the correct plug for your exact application.

NGK 93655 SILZKR7E8EG Laser Iridium spark plug, box of 4. OEM-quality iridium replacement for Honda and Acura K-series engines. Long-life iridium centre electrode and platinum-tipped ground electrode. 0.44 lbs. Ships fast across Canada and the US.

SILZKR7E8EG — Part Number Breakdown

• SI — iridium centre electrode construction
• L — long reach thread (26.5mm)
• Z — special suppression resistor construction
• K — laser-welded iridium tip design
• R — built-in suppression resistor
• 7 — NGK heat range 7 (one step cooler than the common range-6 plugs)
• E — 19mm reach designation
• 8 — projected insulator tip
• EG — electrode gap specification suffix

NGK Laser Iridium — OEM Iridium Quality

NGK’s Laser Iridium plugs use a laser-welded iridium centre electrode tip and a platinum-tipped ground electrode. Iridium is significantly harder and more wear-resistant than nickel (standard) or platinum — the fine iridium tip maintains a consistent, small electrode diameter over the full service life of the plug, which sustains consistent ignition performance and prevents the gradual increase in required firing voltage that occurs as standard electrodes wear and the gap widens. The platinum ground electrode tip provides matching durability and even wear in distributorless (COP) ignition systems where the spark fires in one direction every time, placing asymmetric wear on the ground electrode. Together, the iridium centre and platinum ground maintain a consistent gap and firing voltage for the plug’s full service interval.

Long Service Life

NGK Laser Iridium plugs are designed for extended OEM service intervals — typically 60,000–100,000 km depending on the application, in line with Honda’s factory plug replacement schedule for K-series engines. Unlike standard copper plugs that require replacement at 30,000–48,000 km intervals, the iridium plug’s electrode durability maintains consistent ignition performance across a much longer service window.

Honda / Acura K-Series Application

The SILZKR7E8EG is the OEM-spec NGK iridium plug for Honda and Acura K-series engines, including the K20 and K24 family used across the Civic Si, RSX Type-S, Accord, CR-V, and related applications. NGK is Honda’s OEM spark plug supplier — the Laser Iridium is the correct factory-spec replacement for these engines. Confirm your specific vehicle’s OEM NGK plug number via your owner’s manual or NGK’s fitment lookup before ordering.

Box of 4 — confirm fitment before ordering. Laser Iridium plugs are pre-gapped from the factory — do not adjust the gap; iridium electrode tips are brittle and will fracture if the ground electrode is bent. Torque to Honda’s specification. Replace as a complete set for consistent ignition performance across all cylinders.

Specifications

• Brand: NGK
• Part Number: SILZKR7E8EG (NGK Stock #93655)
• Type: Laser Iridium spark plug
• Centre Electrode: Laser-welded iridium tip
• Ground Electrode: Platinum-tipped
• Thread: 14mm
• Reach: Long (26.5mm)
• Heat Range: 7 (NGK scale)
• Resistor: Yes
• Quantity: Box of 4
• Weight: 0.44 lbs (box)