Bosch W8CC Spark Plug - Type 4 Engines (Long Reach)

Genuine Bosch W8CC spark plug, a long-reach copper-core plug originally fitted to Type 4 aircooled engines used in VW Baywindow Buses and early Type 25 (T3) models, as well as Type 25 Waterboxer engines.

These plugs are also suitable for upright Type 1 aircooled engines that have been fitted with aftermarket cylinder heads requiring a long-reach plug. The W8CC is one of Bosch’s most reliable spark plugs, known for excellent ignition performance, smooth idle, and long service life.

Featuring a 14mm x 1.25mm thread, 19mm reach, and copper-core electrode, the W8CC provides superior heat dissipation and consistent spark under all operating conditions. Its M4 terminal type ensures secure connection with most standard and aftermarket ignition systems.

Ideal for:
Owners seeking dependable ignition performance in Type 4, Waterboxer, or modified Type 1 engines. Perfect for classic VW enthusiasts restoring or maintaining original engines.

Key Features:

• Genuine Bosch W8CC spark plug
• Long reach (19mm) type for Type 4 and Waterboxer engines
• Thread: 14mm x 1.25
• Spanner size: 21mm
• Core: Copper core electrode for optimal conductivity
• Terminal: M4 type connection
• Designed for excellent heat transfer and spark efficiency
• Sold each – 4 required per engine

Compatibility:

• VW Type 4 Aircooled Engines (1700cc, 1800cc, 2000cc)
• VW Baywindow Bus (1700–2000cc, 1972–1979)
• VW Type 25 / T3 Early Aircooled (1979–1982)
• VW Type 25 / T3 Waterboxer (1900cc–2100cc, 1983–1992)
• VW Type 1 engines with aftermarket long-reach heads

Bosch Code Explained:

• W – 14mm thread diameter
• 8 – Heat range (2 = hot, 10 = cold; 8 is mid-range)
• C – 19mm thread reach (long reach type)
• C – Copper-core electrode

Specification:

• Thread size: M14 x 1.25
• Thread reach: 19mm
• Spanner size: 21mm
• Terminal: M4
• Electrode material: Copper
• Quantity: Sold each (4 required per engine)