You are buying 2x BP5FS NGK SPARK PLUG FIT Holden Torana LC 2.8L 6Cyl c/w tapered Seat Gap:0.9 71-72. The workhorse, at the heart of smooth-running engines around the world. Spark Plug. SPARK PLUGS. Spark plugs are the "window" into your engine (your only eyewitness to the combustion chamber), and can be used as a valuable diagnostic tool.