BDFHYK Iridium Spark Plug Set — 6-Pack for Dodge/Jeep 3.7L & 4.7L Engines, OE 4504/PK20TT, Improved Ignition

BDFHYK Iridium Spark Plug Set of 6 delivers reliable ignition for compatible 3.7L and 4.7L Dodge, Jeep, and Mitsubishi engines.

These spark plugs are engineered as direct replacements for OE part numbers 4504 and PK20TT, designed to restore consistent ignition performance and maintain factory-level durability. Constructed with ultra-fine iridium center electrodes and high-density ceramic insulators, the set is intended for vehicles including Dodge Nitro, Ram 1500, Dakota, Durango, and Jeep Commander, Liberty, Grand Cherokee, and Mitsubishi Raider. Before purchasing, confirm fitment by comparing year, make, model, engine size, and OE part number to ensure compatibility.

How do these spark plugs affect engine starting and throttle response?

Iridium-tipped electrodes provide a focused, hotter spark that helps with quicker combustion, which can translate to crisper throttle response and more reliable starting. While gains depend on engine condition and fuel system, these plugs aim to restore the ignition characteristics expected from OE-equivalent parts.

• Fine iridium center electrode for concentrated spark energy
• Improved ignition sensitivity reduces misfires under light load
• OE-level design intended to match factory heat range and seat type

What materials and construction improve longevity compared to standard plugs?

This set uses iridium for the center electrode and isostatic ceramic for the insulator, providing both wear resistance and excellent electrical insulation. These materials are chosen to resist electrode erosion and maintain consistent gap geometry over many miles, which helps extend service intervals relative to conventional copper plugs.

• Extremely fine iridium electrodes resist wear and erosion
• High-density ceramic insulator for mechanical strength and insulation
• Manufactured to TS16949-like quality standards for consistent durability

Are these spark plugs easy to install and what should I check before fitting?

Installation follows the same steps as factory spark plugs: remove old plugs, check and set the correct gap if necessary, torque to vehicle specifications, and reconnect ignition components. Always verify compatibility with the vehicle’s year, engine variant, and OE part number to avoid fitment issues and to ensure correct thread, reach, and seat configuration.

• Direct-replacement design for compatible engines—no modification expected
• Confirm OE numbers 4504 or PK20TT for fitment match
• Use proper torque and anti-seize guidance from manufacturer or service manual

What performance and safety precautions should I follow when buying?

Purchase only after confirming the vehicle’s compatibility and OE reference to avoid incorrect fit or engine issues. These plugs are sold as 100% new auto parts and intended to meet OE-level durability, but proper installation and following the vehicle manufacturer’s service intervals are essential for safe operation.

• Verify year/make/model and OE number before ordering
• Handle with clean tools to avoid contaminating electrodes or insulators
• Replace spark plugs in matched sets as recommended by the vehicle maker

Who this is for: The BDFHYK iridium spark plug set is aimed at owners and technicians who need an OE-equivalent replacement for 3.7L and 4.7L engines in Dodge, Jeep, and Mitsubishi vehicles. It's suited for those seeking improved ignition consistency and longer plug life compared with basic copper plugs, and for anyone performing routine maintenance or engine tune-ups who requires parts compatible with OE numbers 4504 and PK20TT.