High performance silicone jacketed wire offers FAR lower resistance for increased HP Glass impregnated outer layer for max heat rejection Xeramik Series - REAL Ceramic Plug side boot Many different colors available Made in the USA! Compatible with ALL 6.8 7.3 GAS V8 2020+ F250 F350 F450 F600 F53 RV Motorhome Chassis E350 E450 Econoline Cutaway Massive Speed System Wires for V8 Gasoline 445 Cubic Inch CI CID 7.3 and 6.8 Gas Gasoline Engine compatible with Godzilla Found in Ford Heavy Duty Trucks F-250 F-350 F-450 F-550 Econoline F53 Cab and Chassis / Cutaway Motorhome Camper Chassis Ford's new Godzilla engine is a big tough engine that provides tons of power and rock solid construction. The spark plug wires they included.... not so much. They have been known to fail literally on the dealer's lots, if not on trucks with only a few miles. Poor quality materials and workmanship cause misfires, poor idle, loss of power and limp mode. Expect lots of random misfire codes and your service department asking you to drop it off immediately. The factory stamped steel heat reflector looks cool and provides good short term heat shielding. But long term, heavy hauling engines create lots of heat. After a short exposure, this steel boot becomes a conductor. It absorbs the radiant heat and proceeds to cook the boot and connection inside. This leads to very premature failure. Massive released their performance wires over a year ago and many have welcomed their superior performance. BUT. If they weren't clocked juuuuust right, contact could occur and wires/boots were still getting melted. We decided the NUCLEAR option was the way to go. A full on ceramic (Real ceramic - its like if your coffee mug took on a second life as a bad ass hot rod part) boot that WILL NOT be melted, the ultimate insulator. Say goodbye to potential on road troubles, limp modes, CELs and failures once and for all with the new Massive Xeramik series wires!!!! . Wound Core Mag-Wire 500 ohm/ft = maximum R.F.I. and E.M.I. protection @ 1/10 resistance of Carbon Core conductor. OEM Wires measure over 3000 ohms per foot by comparison!!! Dielectric grease is included to ease both installation and future removal. Quality made in the USA!!!