Bosch 7442 Copper Nickel Spark Plug - WSR7F

The Bosch 7442 (WSR7F) is a copper spark plug featuring a heavy-duty nickel center electrode designed to restore factory performance levels in a wide range of applications. This resistor-type spark plug delivers reliable ignition performance with superior resistance to spark erosion.

Key Features:

• Heavy-duty copper core center electrode for superior reliability and increased resistance to spark erosion
• Metal glass-fused resistor for maximum interference suppression
• Ribbed insulator design prevents misfires due to current leakage
• 14mm thread diameter with 9.5mm reach and flat seat design
• Nickel-plated rolled threads for anti-seize and corrosion protection
• Pre-gapped at the factory for convenient installation

Bosch spark plugs are engineered to meet or exceed original equipment specifications, providing dependable ignition performance for modern gasoline engines. The copper core design offers a broader heat range to resist pre-ignition and fouling, making this plug suitable for various automotive, powersports, and small engine applications.