JUNKYARD 5.3L SPARK PLUG TEST. HOT PLUGS VS COLD PLUGS-WHICH ONE WORKS BETTER? HOW TO TEST SPARK PLUG HEAT RANGE. TESTED DENSO IK16 (HOT PLUG) VS DENSO IK31 (COLD PLUG) ON ALLL-ALUMINUM, 5.3L L33 EQUIPPED WITH BTR RED HOT CAM, FAST LSXR INTAKE AND LONG TUBES. ALSO TESTED TAPERED SEAT PLUGS VS GASKET SEAT PLUGS-DOES IS CHANGE POWER? ONCE AGAIN WE HAVE TO ASK-WHEN IT COMES TO IMPROVING LS POWER, SHOULD WE EVEN BE LOOKING AT SPARK PLUGS?
