NGK Spark Plug NGK BPR4HS EA

Superior construction for serious power. Versatile plugs with wide operating heat ranges prevent fouling from running too cool and preignition from running too hot. Features high alumina ceramics for improved heat dissipation and electrical insulation, deep-seated copper core for a wider heat range and a nickel alloy tip for longer life.

Shell Thread Diameter: 14mm
Shell Thread Pitch:1.25mm
Shell Seat Type: Gasket
Shell Reach:12.7mm 
Shell Hex Size:21mm
Terminal Type: Solid
Overall Height JIS Gap:0.7mm
Resistor: Yes
Resistor Value: 5k Ohm
Heat Range: 4
Brand: NGK
Longevity:30k Miles
Center Electrode Material: Nickel
Center Electrode Type: Standard
Center Electrode Size:2.5mm
Center Electrode Projection: Projected
Ground Electrode Material: Nickel
Ground Electrode Type: Standard
Ground Electrode Quantity:1