A-Premium Ignition Coil Pack & Iridium Spark Plug Kit for Honda Civic 2006–2011 L4 1.8L — 4-Pack, OEM Fit, Longer Life

A-Premium's 4-piece ignition coil pack plus iridium spark plug kit replaces worn coils and plugs on Honda Civic 2006–2011 L4 1.8L engines to restore reliable spark delivery and smoother running.

This complete replacement kit bundles four ignition coils matched to OEM fitment and four premium iridium-tip spark plugs engineered for longer life and stable combustion. Designed for direct bolt-on installation at the valve cover with blade-style terminals, the kit meets the electrical resistance and mechanical specifications required for the Civic 1.8L L4, using reference numbers 30520-RNA-A01 / UF-582 to simplify identification. A-Premium backs the set with a one-year unlimited-mileage guarantee, so you have a straightforward service solution when diagnosing misfires, rough idle, or reduced starting performance.

How will swapping to these coils and iridium plugs affect engine starting and idle?

Replacing old coils and plugs restores consistent spark timing and intensity, which helps the engine start more quickly and run with a smoother idle. Iridium center electrodes are more wear-resistant than conventional materials, maintaining a stable gap longer and avoiding weak or intermittent sparks.

• Iridium + nickel central electrode for extended service life and steady spark.
• Specified gap 1.0–1.1 inches to match engine ignition settings.
• Primary resistance 0.86–1.05 ohms, secondary 5.5–6.7 kΩ for expected electrical performance.
• Bolt-on mounting at the valve cover for reliable alignment and sealing.

What are the compatibility and reference numbers I should check?

This set is tailored for Honda Civic models with the 2006–2011 L4 1.8L petrol engine. Use the reference numbers provided to confirm fit with your vehicle or parts lookup tools before purchase.

• Vehicle fitment: Honda Civic 2006–2011 L4 1.8L petrol.
• Reference numbers: 30520-RNA-A01, 30520RNAA01, UF-582, UF582.
• Thread diameter: 14 mm to match factory spark plug seats.
• Installation torque recommendation: 25–30 N·m for correct seating without damage.

How difficult is installation, and what mounting details should I prepare for?

Installation is straightforward for anyone comfortable with basic engine maintenance. Each coil mounts with a bolt onto the valve cover and uses a 3-terminal blade electrical connection; spark plugs thread into the cylinder head like standard plugs.

• Coil terminal type: blade connectors—disconnect battery before handling.
• Coil terminal quantity: 3 per coil for secure electrical contact.
• Mount type: bolt-on; keep original mounting hardware or replace if corroded.
• Torque spec: tighten spark plugs to 25–30 N·m to avoid leaks or thread damage.

What performance and longevity benefits do iridium plugs provide?

Iridium is a hard, wear-resistant alloy used at the plug’s center electrode that reduces erosion and preserves the spark gap over more miles than standard copper or nickel-only plugs. That stability typically yields more consistent combustion, which can translate to steadier throttle response and potentially better fuel use under similar driving conditions.

• Longer service life — roughly three times longer than conventional plugs.
• More stable idle and ignition timing accuracy over time.
• Improved ignition consistency for smoother starts and accelerations.
• Reduced electrode wear helps maintain efficiency and emissions control.

Who is this for: The A-Premium set is aimed at Honda Civic owners, DIY enthusiasts, and independent technicians who need a precise, direct-replacement ignition coil and spark plug kit for 2006–2011 1.8L engines. It suits anyone troubleshooting misfires, rough idle, poor starts, or following routine tune-up intervals who wants a reliable, longer-lasting iridium solution backed by a one-year unlimited-mileage guarantee.