X4XZ UF311 Ignition Coil & 9807B-561BW Spark Plug Kit — 4-Pack Double Iridium for Honda/Acura, Direct-Fit, Long-Life

X4XZ UF311 ignition coil and 9807B-561BW double iridium spark plug kit is a direct-fit replacement set designed to restore reliable spark delivery and smoother engine operation on compatible Honda and Acura 4-cylinder models. This complete kit includes four ignition coil packs and four double iridium spark plugs built to meet or exceed original equipment specifications. The components are engineered for long service life, stable ignition under load, and improved cold-start response. They suit a range of Honda and Acura models from the early 2000s to early 2010s, making this kit a practical repair or maintenance upgrade for owners who need dependable ignition components.

Which vehicles will this ignition coil and spark plug set fit?

This kit targets common Honda and Acura 2.0L and 2.4L four-cylinder applications as specified by the manufacturer. It covers many model years and platforms; always cross-check part numbers or the vehicle reference image before purchase to confirm compatibility.

• Fits: 2003–2007 Honda Accord 2.4L, 2002–2011 Honda Civic 2.0L
• Also fits: 2002–2009 Honda CR-V 2.4L, 2003–2011 Honda Element 2.4L
• Additional: 2004–2005 Honda S2000 2.2L, 2006–2011 Acura CSX 2.0L, 2002–2006 Acura RSX 2.0L

How do these parts affect engine performance and drivability?

Worn or failing coils and plugs can produce misfires, rough idling, reduced power, and poorer fuel economy. Replacing them with quality direct-fit parts restores consistent spark timing and combustion, which improves throttle response and smoothness across RPM ranges.

• Reduces engine misfire and rough idle when installed correctly
• Double iridium plugs offer longer life and stable spark delivery
• Coil design includes ferrite noise suppression for cleaner ignition signals

What makes X4XZ’s coils and double iridium plugs different from standard replacements?

The coils are made from durable materials with thermoplastic connectors and internal suppression to prevent radio-frequency interference. The spark plugs use a double iridium construction that increases electrode life and helps maintain consistent spark performance over many kilometers.

• Double iridium spark plugs rated for extended service life (up to high mileage)
• Stainless-steel spring and ferrite suppressor in coils to protect electronics
• OE-matching form and connectors for straightforward installation

Will I need extra tools or parts to install this kit?

The package contains four ignition coils and four spark plugs and is intended as a direct replacement for the listed OE numbers. Basic hand tools and a torque wrench are typically sufficient; no special adapter parts are included, and professional installation is recommended if you are not comfortable with ignition work.

• Includes: 4 ignition coil packs and 4 double iridium spark plugs
• Does not include: instruction manual or additional adapters
• Recommended tools: spark plug socket, torque wrench, basic hand tools

Who is this for? This X4XZ kit is aimed at DIY mechanics and service technicians who maintain Honda and Acura four-cylinder engines and need a dependable, long-lasting ignition upgrade or replacement. It’s suitable for owners experiencing misfires, rough idle, or decreased performance who prefer a direct-fit, quality aftermarket option backed by a one-year product service and 24-hour customer support.

FAQ

Q: Are these coils and plugs direct replacements for my Honda Civic 2006 2.0L?

A: Yes—this X4XZ kit lists compatibility with 2002–2011 Civic 2.0L models; verify OE numbers to confirm exact fit.

Q: How long do the double iridium spark plugs typically last?

A: Double iridium plugs are designed for extended life and stable spark delivery, often lasting well over typical service intervals.