You are buying 2x BKR6E NGK SPARK PLUG FIT Mazda B2600 2.6L 4G54 4Cyl Carb, SOHC, 73kW 182Nm 90-91. 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.