Autolite 4 Pack of Genuine OEM Spark Plugs - 388-4PK

Includes (4) 388 Spark Plugs. Thread Size: 18mm, Thread Pitch: 1.5mm, Seat Type: Gasket, Reach: 12.7mm (1/2"). Hex Size: 7/8" (22mm), Terminal Type: Removable Nut. Material: Nickel, Type: Heavy Duty, Projection: Non-Projected. Copper core improves resistance to fouling. Compatible with the Following: Bosch: 7548, 7549, M10AC0, M8AC0, Champion: 10-COM, 10-COM-64, 523, 8-COM-C, 8-COM-D, 9-COM, D23

MAXIMUM PERFORMANCE: Every Copper Spark Plug has a full copper core electrode which provides higher thermal conductivity for better performance in all conditions IMPROVED DURABILITY: All Autolite spark plugs are Leak proof and come with a heat fused internal seal for long lasting durability CONSTRUCTION: These replacement spark plugs have a copper-glass seal which bonds the insulator and the terminal post center electrode together FUEL EFFICIENCY: The Autolite copper automotive replacement spark plug are guaranteed to deliver quick starts, better fuel economy and smooth acceleration AUTOLITE ADVANTAGE: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on our copper plugs for performance and value, backed by decades of experience and passion