DO CHEAP SPARK PLUGS WORK AS WELL AS EXPENSIVE PLUGS? COPPER PLUGS VS PLATINUM PLUGSWHICH ONE WORKS BEST? CAN YOU ADD POWER WITH PERFORMANCE SPARK PLUGS? DO PLATINUM PLUGS REALLY WORK? WHAT IS THE BEST SPARK PLUG FOR MY LS? HOW TO SWAP SPARK PLUGS! CHECK OUT THIS VIDEO WHERE I COMPARED THREE DIFFERENT TYPES OF NEW SPARK PLUGS TO A TIRED SET OF MISMATCHED PLUGS ON MY JUNKYARD TEST MOTOR. THE 5.3L L3 WAS RUN FIRST WITH MY SUPER RICHIE, JUNKYARD PLUGS, THEN WITH NEW E3 PLUGS (WITH DIAMOND FIRE TECHNOLOGY), A SET OF NGK LASER PLATIMUM PLUGS AND A SET OF CHEAP AUTOLITE COPPER PLUGS. HOW MUCH POWER DID THE EXPENSIVE PLUGS MAKE ON THE BTRCAMMED 5.3L?