Champion Copper Plus Spark Plug 446 (REC12MCC4) – 14mm, 1" Reach, Gasket Seat, Pre-Gapped 1.0mm (0.039")

The Champion Copper Plus 446 is a dependable OE-style copper spark plug built for consistent performance and durability. It features a copper core center electrode for improved conductivity and heat control, plus a corrosion-resistant design and SAC-9 resistor to help reduce EMI/RFI interference. Ideal for maintenance and tune-ups—always confirm fitment and OE gap spec for your application. 

Key Features

• Copper core electrode helps provide accurate heat control and reliable performance 
• Superior corrosion resistance for longer service life 
• Patented SAC-9 resistor for maximum EMI/RFI suppression 
• Built to ISO & SAE standards for proven performance 
• Pre-gapped to 1.0mm (0.039") for quick installation (verify OE spec) 

Product Specifications

• Brand: Champion 
• Series: Copper Plus 
• Part Number: 446 (REC12MCC4) 
• Thread Size: 14 mm (M14 x 1.25) 
• Reach: 1 in (approx. 26.5 mm / 1.04") 
• Seat Type: Gasket 
• Hex Size: 5/8 in (16 mm) 
• Electrode Gap (Pre-gap): 1.0 mm (0.039")