ECCPP UF378 Ignition Coils with 16 Iridium Spark Plugs - 2005 5.7L V8

In this review of the ECCPP UF378 ignition coil and spark plug kit the bottom line is practical: it is a budget-friendly direct replacement for owners of Chrysler 300, Dodge Magnum, and Jeep Grand Cherokee with the 2005 5.7L V8 who need an all-in-one ignition service. The package combines eight coil packs and 16 iridium spark plugs designed to meet or exceed OE specifications, and the single biggest reason to buy is the ready-to-install compatibility and claimed 15% energy boost over stock coils that aim to restore smooth running and resolve misfires or poor economy.

Key Features

• Direct Compatibility: Built to fit Chrysler 300, Dodge Magnum, and Jeep Grand Cherokee 2005 5.7L V8 engines for straightforward replacement without modification.
• OEM Fit Targeted: Designed to replace OEM part number UF378 so installers can match factory locations and connections with minimal hassle.
• Enhanced Energy Output: ECCPP states coils deliver about 15% more energy than OE coils, which can improve ignition stability and throttle response.
• Durable Construction: High conductive copper wire and high dielectric epoxy are used to improve electrical conductivity and resist heat-related degradation.
• Corrosion-Resistant Connectors: Precise, corrosion-resistant connections are intended to maintain reliable electrical contact over time for steady spark delivery.
• Complete Service Kit: Shipping eight ignition coils and 16 iridium spark plugs supports replacing coils and plugs together, a recommended maintenance step to clear misfire and cold-start issues.

Who It's For

This kit is best for DIY mechanics and independent shops working on 2005 model-year Chrysler 300, Dodge Magnum, or Jeep Grand Cherokee vehicles with the 5.7L V8 who want a single purchase to replace all coils and plugs at once. It suits owners troubleshooting misfires, check engine lights, or rough idle who prefer replacing the full ignition set to restore performance.

It is not aimed at owners of other model years or different engines, and buyers seeking OE-branded parts or extended-warranty dealer components should look elsewhere. Also, anyone prioritizing long-term durability above initial value should weigh mixed user reports about longevity.

Pros & Cons

Pros

• Good fit and easy installation for compatible 2005 5.7L V8 vehicles, reducing shop time.
• Performs well to resolve misfire and restore smooth idle and fuel economy in many user reports.
• Complete set of eight coils and 16 iridium plugs offers convenience and value for a full ignition service.
• Designed with conductive copper windings and high dielectric epoxy for better electrical performance.

Cons

• Durability is mixed in customer feedback, with some reports of early failures that warrant realistic expectations.
• Some buyers have reported receiving incorrect plugs in isolated cases, so verify contents on arrival.

Specifications

Our Verdict

The ECCPP UF378 kit is a practical, cost-effective option for 2005 5.7L V8 owners who need a full ignition refresh without buying parts piecemeal. It offers good fitment, improved energy output claims, and convenience, making it solid value for most DIYers and independent shops; buyers should inspect received parts on delivery and be aware of mixed durability reports when considering long-term expectations.

Frequently Asked Questions

Are these coils and plugs a direct fit for a 2005 Chrysler 300 5.7L?
Yes, the kit is specified for the 2005 Chrysler 300 with the 5.7L V8 and replaces OEM part UF378 for a direct replacement.

Should I replace coils and spark plugs together?
Yes, replacing coils and plugs together helps ensure consistent ignition performance and can reduce misfire and rough-start issues.

Do these parts come pre-gapped and ready to install?
Iridium plugs typically come pre-gapped to OE specs, but it is advisable to check gap and inspect all components on arrival before installation.