NGK 55005 Spark Plug Wire Set

NGK Spark Plug Wire Set for Subaru Legacy and Outback

The NGK Spark Plug Wire Set, part number 55005, is a specific-fit ignition wire set for select 2004-2005 Subaru Legacy and Subaru Outback applications with California Emission System configurations. Built with blue silicone insulation and noise suppression, it supports stable spark delivery in demanding ignition systems.

Key Features

• Specific-fit NGK Spark Plug Wire Set for confirmed Subaru applications
• Blue silicone insulation for heat resistance and durability
• Ferro Mag core material for ignition performance
• Noise suppression type included
• 7.00 mm insulation outside diameter
• Part number 55005, also identified as RC-FX102

Product Details

NGK Spark Plug Wire Set 55005 is part of the NGK Spark Plug Wire Set line, which focuses on ignition components for domestic and import vehicles. NGK draws on extensive OE experience and long-term automotive manufacturing expertise to produce replacement ignition parts that meet OE-level durability and operational expectations. This wire set is a direct-fit replacement for 2004 Subaru Legacy, 2004 Subaru Outback, 2005 Subaru Legacy, and 2005 Subaru Outback applications listed with California Emission System requirements. The blue silicone jacket, Ferro Mag core, and noise suppression design support consistent ignition signal transfer while helping maintain clean engine operation.

This part cross-references DENSO Auto Parts 671-4304 for the same application.

What It Helps Address

• Misfires caused by worn or damaged ignition wires
• Hard starting related to weak spark transfer
• Ignition noise that can interfere with engine operation
• Rough idle from deteriorated wire insulation or core wear
• Voltage leakage from aging spark plug leads

Installation Notes and Tips

Verify engine configuration and California Emission System fitment before installation. Match each lead to the correct cylinder routing and inspect coil boots and spark plug terminals for wear during replacement. For 2004 Subaru Legacy and Outback applications, the listed wire leads are approximately 20 inches in length; for 2005 Subaru Legacy and Outback applications, confirm the straight 180-degree coil boot configuration before installation. Use the part number 55005 to confirm the correct NGK Spark Plug Wire Set for your vehicle.

Quality Assurance

NGK is an established ignition specialist with broad OE experience and a long history of manufacturing ignition components for global vehicle coverage. Part number 55005 is built to support OE-style replacement needs for Subaru Legacy and Subaru Outback ignition service.