X4XZ Ignition Coil & Double-Iridium Spark Plug Kit for 2000–07 Dodge Ram 4.7L — 8 Coils + 8 Plugs, Direct-Fit

This X4XZ kit supplies eight UF270 ignition coils paired with eight 4503 double-iridium spark plugs engineered for Ford-style 4.7L V8s in 2000–2007 Dodge Ram and compatible models.

If your Ram shows rough idle, hesitation under load, or reduced fuel efficiency, worn coils or plugs are often the cause. This replacement pack is built to match or exceed original equipment fit and function, delivering stable spark delivery, longer component life, and straightforward bolt-in installation for owners and mechanics maintaining mid-2000s Dodge Ram 1500, Dakota, Durango, and related vehicles.

How will these ignition coils and plugs affect drivability?

Replacing degraded coils and worn spark plugs restores consistent combustion across all cylinders. Expect smoother idle, fewer misfires, and more responsive throttle feel once the electrical and firing gaps are renewed.

• Reduces engine misfire and rough-idle incidents
• Improves throttle response and steady power delivery
• Helps recover lost fuel economy caused by weak sparks

What makes the 4503 double iridium plug and UF270 coil durable?

The double-iridium electrodes resist erosion far longer than standard plugs, extending service intervals up to roughly 100,000 kilometers under normal use. The UF270 coils use robust materials and internal noise suppression to resist heat cycling, vibration, and radio-frequency interference that can degrade older units.

• Double-iridium tip for extended wear life and consistent sparks
• Stainless-steel spring and ferrite suppressor reduce electrical noise
• Thermoplastic connector resists heat-related cracking and ensures secure fit

Which vehicles and part numbers are covered by this kit?

This kit lists compatibility with many Dodge, Jeep, Chrysler, and Mitsubishi models that use the 4.7L V8 from model years around 1999–2008. It matches OE reference UF270 and 4503 and replaces several legacy numbers used across manufacturers.

• Designed for 2000–2007 Dodge Ram 1500 V8 4.7L and other listed vehicles
• OE reference: UF270 & 4503; replaces SKIC038, UF297 and multiple factory codes
• Package includes 8 coils + 8 double-iridium spark plugs (no manual)

How easy is the installation and what should I prepare?

Installation follows the original coil-on-plug layout and generally requires basic hand tools and a torque wrench for proper plug seating. While many DIYers can handle the swap in a driveway, have the vehicle cooled and follow torque and gap specs to avoid thread or connector damage.

• Direct-fit replacements for coil-on-plug applications on listed models
• Requires basic tools: ratchet, spark plug socket, torque wrench, anti-seize optional
• No printed instructions included; refer to vehicle service manual for torque and gap

Who is this for? This X4XZ ignition coil and double-iridium plug kit is aimed at owners, independent shops, and fleet managers working on 4.7L V8 vehicles from the mid-2000s who need a full-cylinder replacement set. It’s ideal when multiple misfires or uneven performance indicate several failing coils or plugs, or when you prefer replacing all ignition components at once to restore smooth operation and long-term reliability.