Key benefits - Reliable ignition for Chevy small block Gen I V8 engines - Resistor design reduces electrical interference and helps prevent misfires - Durable copper core with nickel alloy electrode tip for longevity - Projected insulator supports stable spark and helps resist fouling - OEM fit: 14 mm thread size, 0.460 in reach, tapered seat for a secure seal - Easy installation with a single ground strap and standard 5/8 in wrench size - Not a shorty spark plug, aligned with factory length and performance expectations Compatibility and fit - Engine: V8 - Engine Size: 5.7L/350 - Engine Family: Chevy small block Gen I - Spark plug type: Standard length (not shorty) - Resistor: Yes - Manufacturer Heat Range: 4 - Electrode Tip Material: Nickel alloy - Electrode Core Material: Copper - Insulator Type: Projected - Spark Plug Thread Size: 14 mm - Spark Plug Reach: 0.460 in - Spark Plug Seat Style: Tapered - Wrench Diameter: 5/8 in - Ground Strap Quantity: One Material and design details - Electrode Tip Material: Nickel alloy - Electrode Core Material: Copper - Insulator Type: Projected Use scenarios - Routine maintenance on a Chevy 5.7L V8 vehicle (truck, muscle car, or sedan) that uses a Chevy small block Gen I engine - Engine rebuild or restoration that requires OEM-spec spark plugs with standard length and 14 mm threads - Replacement in applications where a single ground strap and tapered seat are preferred for a reliable seal and easy torque with standard socket tools Specifications at a glance - Engine: V8 - Engine Size: 5.7L/350 - Engine Family: Chevy small block Gen I - Spark plug length: Standard (not shorty) - Resistor: Yes - Heat Range: 4 - Electrode Tip Material: Nickel alloy - Electrode Core Material: Copper - Insulator Type: Projected - Thread Size: 14 mm - Reach: 0.460 in - Seat Style: Tapered - Wrench Diameter: 5/8 in - Ground Strap: One