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NGK 8931 Spark Plug Wire Set
| Brand | NGK 8931 |
|---|---|
| Core Material | Mag (Var. Pitch) |
| Insulation Color | Blue |
| Insulation Material | Silicone |
| Insulation Outside Diameter | 7.00 |
| Noise Suppression Type | Yes |
| Part Number | RC-FX50 |
| Stock Number | 8931 |
| Universal Or Specific Fit | Specific |
| Product line | NGK Spark Plug Wire Set |
| Fits | Subaru · 3 vehicles |
OE-standard quality. Built to meet original-equipment durability and performance expectations.
Silicone insulation. Helps resist heat and wear for dependable ignition performance.
Noise suppression. Helps reduce electrical interference in the ignition system.
Cross-references Anchor 9026, Carlson 7573 and DENSO Auto Parts 671-4261 for the same application. See all 13.
NGK Spark Plug Wire Set for Subaru Legacy
The NGK Spark Plug Wire Set 8931 is a specific-fit ignition wire set for select Subaru Legacy applications. Built with blue silicone insulation and noise suppression, it is engineered to support stable spark delivery and consistent ignition performance.
Key Features
- Specific-fit NGK spark plug wire set for confirmed Subaru Legacy applications
- Blue silicone insulation for heat resistance and durability
- Mag (Var. Pitch) core material for ignition noise suppression
- 7.00 mm insulation outside diameter
- NGK part number 8931, also identified as RC-FX50
Product Details
NGK Spark Plug Wire Set 8931 is part of NGK Spark Plug Wire Set line, a product family focused 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 performance expectations. This wire set is built for 1997 Subaru Legacy models from 5/1997 and 1998-1999 Subaru Legacy models, making it a direct-match option for Subaru Legacy ignition wire replacement needs.
This part cross-references DENSO Auto Parts 671-4261 for the same application.
What It Helps Address
- Misfires caused by worn or damaged ignition wires
- Intermittent spark delivery in Subaru Legacy ignition systems
- Radio-frequency interference that can affect ignition performance
- Cracked or heat-aged wire insulation
- Hard starting related to degraded spark plug wire condition
Installation Notes and Tips
Verify engine application and routing before installation, especially on 1997 Subaru Legacy vehicles built from 5/1997. Match each wire to the correct cylinder and coil connection, and inspect boots, terminals, and adjacent ignition components for wear before reassembly. Confirm the NGK 8931 part number and RC-FX50 reference against the vehicle’s original wire set before installation.
Quality Assurance
NGK is known for ignition-focused OE expertise and manufactures premium ignition products to support durability and operational performance standards. The 8931 wire set reflects that OE-oriented approach for Subaru Legacy ignition service.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1999 | Subaru | Legacy | 2.5L | H4 | N/A | NGK Spark Plug Wire Set |
| 1998 | Subaru | Legacy | 2.5L | H4 | N/A | NGK Spark Plug Wire Set |
| 1997 | Subaru | Legacy | 2.5L | H4 | N/A | From 5/1997; NGK Spark Plug Wire Set |
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