BPZ8HN-10 V-Power Spark Plug | NGK 4495 Premium NGK spark plugs are known for their reliable performance and superior anti-fouling characteristics. NGK spark plug BPZ8HN-10 Stock number 4495 14mm thread size 12.7mm thread length Projecting insulator type Inductive resistor type Gasket seat V-Power Type Gap 0.039 in. (1.0mm) 13/16 in. hex