You are buying 2x BKR5E-11 NGK SPARK PLUG FIT Mitsubishi Triton MK 2.4L 4G64 4Cyl MPFI Gap:1.1 96-06. 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.