Genuine Bosch WR8AC Spark Plug | Air-Cooled VW & Porsche | 14mm, 1/2" Reach, Pre-Gapped (7902)

Genuine Bosch WR8AC Spark Plug (7902) — 14mm, 1/2" Reach

Upgrade your ignition system with the industry-standard Genuine Bosch WR8AC (7902) Spark Plug, the factory-recommended replacement for classic air-cooled Volkswagen and Porsche engines. Engineered for reliable, consistent performance in 1100cc–1600cc air-cooled motors.

Vehicle Fitment

• VW Beetle: 1954–1979
• VW Bus (Type 2): 1954–1979
• VW Karmann Ghia: 1955–1979
• VW Type 3 (Squareback/Fastback/Notchback): 1961–1973
• VW Thing: 1973–1975
• Porsche 356: 1954–1965

Key Features & Benefits

• Factory-Recommended: The industry-standard replacement plug for air-cooled VW and Porsche ignition systems.
• Pre-Gapped: Set to .024" and ready for immediate installation.
• Terminal Nut Installed: Ships with the terminal nut (resistor cap) installed; unthread it if you are using original-style spark plug wire ends.

Technical Specifications

• Thread Size: 14mm
• Reach: 1/2" (12.7mm)
• Gap: Pre-gapped to .024"
• Engine Range: 1100cc–1600cc air-cooled
• Part Numbers: Bosch 7902 / WR8AC (Ref. P/N: 98-9932-B, WR8DP)
• Sold As: Sold individually

Frequently Asked Questions

• Are these pre-gapped? Yes — they come pre-gapped at .024" and ready to install.
• Are the plugs sold individually or as a set? Sold individually.
• What do I do with the terminal nut for original-style wires? The plugs ship with the terminal nut (resistor cap) installed; simply unthread it if you use original-style spark plug wire ends. Test-fit your wires before final torquing.

Explore Related Categories

Ignition, All VW Air-Cooled, All Porsche