HomeIgnition > Ignition Wire and Related ComponentsDenso 671-4304 Spark Plug Wire Set
Part #: 671-4304

Denso 671-4304 Spark Plug Wire Set

7mm
⚙️ 4 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦7mm
🚗Fitment: Subaru, Legacy and Outback
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Overview of Denso 7mm Spark Plug Wire Set 671-4304

The Denso 7mm Spark Plug Wire Set 671-4304 is designed specifically for Subaru Legacy and Outback models. This ignition wire set ensures reliable electrical conductivity and durability with its silicone spark plug boot material and precise terminal configurations.

  • Silicone spark plug boot material for heat resistance and flexibility
  • 7.00mm insulation outside diameter for optimal electrical insulation
  • Female distributor coil end terminal type for secure connection
  • 90-degree angled female spark plug end boots (quantity: 4) for tight engine bay fitment

Detailed Product Features and Specifications

This spark plug wire set features a 7.00mm insulation outside diameter, providing effective protection against electrical interference and heat exposure. The silicone spark plug boots offer enhanced durability and flexibility, which is essential for maintaining a secure connection in the engine compartment. Both the distributor coil end and spark plug end terminals are female type, ensuring compatibility with the ignition system of Subaru Legacy and Outback vehicles. The spark plug end boots are angled at 90 degrees, allowing for easier installation in confined spaces and reducing strain on the wires.

About the Denso 7mm Brand Line

The Denso 7mm brand line focuses on ignition wire sets with a 7.00mm insulation diameter, balancing durability and performance for reliable ignition system operation. This line is engineered to meet the specific requirements of various vehicle models, including Subaru Legacy and Outback, providing consistent electrical conductivity and resistance to heat and wear.

Applications and Common Issues Addressed

  • Replacement for worn or damaged spark plug wires in Subaru Legacy and Outback
  • Resolves misfires caused by poor electrical conductivity
  • Prevents ignition system shorts due to insulation breakdown
  • Improves engine performance by maintaining consistent spark delivery
  • Reduces risk of wire damage from heat and vibration

Installation Notes and Tips

When installing the Denso 7mm Spark Plug Wire Set 671-4304, ensure that the 90-degree angled spark plug boots are properly seated on the spark plugs to avoid loose connections. Verify that the female terminals on both the distributor coil end and spark plug end are securely attached. Route the wires carefully to prevent contact with hot engine components or moving parts. It is recommended to replace all wires in the set simultaneously to maintain balanced ignition performance.

Quality Assurance and Warranty

Denso manufactures this spark plug wire set to meet OEM specifications for Subaru Legacy and Outback models. The use of silicone boots and precise terminal design supports long-term reliability. While specific warranty details are not provided here, Denso products typically come with manufacturer-backed quality assurance to ensure performance and durability.

BrandDenso
Part Number671-4304
Position7mm
Bushing Material4
Distributor Coil End Terminal TypeFemale
Insulation Outside Diameter7.00
Spark Plug Boot MaterialSilicone
Spark Plug End Boot Degree90
Spark Plug End Terminal TypeFEMALE

This part fits 4 vehicles. Search below:

YearMakeModelPositionNotes
2005SubaruLegacyN/ANon-Turbo, California; 7mm
2005SubaruOutbackN/AIgnition Wire Set, Non-Turbo, California; 7mm
2004SubaruLegacyN/ACalifornia; 7mm
2004SubaruOutbackN/ACalifornia; 7mm

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.