EVIL ENERGY UF378 Ignition Coil & 8.5mm Spark Plug Wire Kit for 2003-2005 Dodge Ram 1500 2500 3500 5.7L HEMI

2003-2005 Dodge Ram 5.7L HEMI Ignition Coil & Wire Kit

Aging coils, heat-cycled plug wires, and deteriorated boots can leave the ignition service incomplete when only one part of the 5.7L HEMI system is replaced. This EVIL ENERGY kit combines a complete eight-coil replacement set with eight 8.5mm spark plug wires and basalt heat sleeves for owners maintaining the specified 2003-2005 Dodge Ram 1500, 2500, and 3500 trucks used for daily driving, towing, work, or scheduled ignition-system service.

The ignition coil produces the high-voltage output, while the short secondary wire carries that output through the covered HEMI coil-and-wire layout. Replacing both components during the same service provides a coordinated way to address age, heat exposure, damaged boots, increased wire resistance, and loose coil-to-plug connections. Engine operation still depends on spark plugs, connectors, wiring, grounds, fuel delivery, compression, calibration, and the condition of the remaining systems.

Why Service the 5.7L HEMI Coils and Wires Together?

• One connected ignition path: The coils and secondary wires operate as related parts of the covered HEMI ignition layout, so both should be inspected during service.
• Complete eight-cylinder package: The bundle supplies eight coils, eight wires, and eight heat sleeves for the listed 5.7L V8 trucks.
• Heat-aware wire construction: The wires use an 8.5mm silicone-insulated body, stainless steel conductor, and manufacturer-listed EMI/RFI suppression.
• Additional boot-area protection: The included basalt sleeves provide an extra barrier against radiant engine-bay heat, but they must not contact exhaust components directly.
• Controlled bundle scope: The fitment is limited to the three 2003-2005 Dodge Ram 5.7L HEMI applications shown above.

UF378 Replacement Coil Set for the Early 5.7L HEMI

The EVIL ENERGY replacement coil set is listed against the UF378 reference. The manufacturer lists a 44,000 V maximum voltage, 1.526 ms spark duration, 0.7 Ω primary resistance, 6.67 kΩ secondary resistance, and a 65:1 turns ratio. These component specifications do not establish a guaranteed engine-output increase and do not replace diagnosis of the complete ignition and fuel systems.

Before ordering, compare the existing coil connector, mounting points, case shape, and wire connection with the product photos and the original parts on the truck. Prior engine swaps, harness repairs, or ignition-system conversions can change compatibility even when the make, model, engine, and year appear in the table.

8.5mm HEMI Spark Plug Wires with Basalt Heat Sleeves

The included red spark plug wires use a stainless steel conductor with silicone insulation and a manufacturer-listed resistance of 293-439 Ω per foot. The wire set uses 90-degree DD-style plug-end boots and pre-installed coil-end connections for the referenced 5.7L HEMI layout.

Each wire is paired with a 22 mm × 155 mm basalt heat sleeve. Install the sleeves at the plug end where additional radiant-heat protection is needed, while keeping both the wire and sleeve away from direct exhaust contact, sharp edges, moving parts, and unnecessary tension.

Bundle Fitment for 2003-2005 Dodge Ram 5.7L HEMI Trucks

This bundle is limited to 2003-2005 Dodge Ram 1500, 2003-2005 Dodge Ram 2500, and 2003-2005 Dodge Ram 3500 trucks equipped with the 5.7L 345 cu. in. naturally aspirated gasoline V8. No other model, engine size, or year range is included in this bundle listing.

Use the exact vehicle, year, and engine combination: Do not order from the HEMI name alone. Confirm that the truck retains the expected UF378-style coil connector and mounting arrangement, eight-wire layout, and 90-degree plug-boot clearance. Modified, converted, or engine-swapped trucks require direct comparison with the installed components.

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