The same performance as your GM vehicle's original factory componentSpark plug distributor boot shape and materials provide proper fit, installation, and water-tight sealTerminal design improves spark plug retention and assists installation with excellent corrosion resistanceFiberglass braid and carbon impregnated fiberglass core for added strength and superior conductivityEngineered for electromagnetic interference and radio frequency interference (EMI/RFI) noise suppressionACDelco GM Original Equipment Spark Plug Wire Sets features thick silicone jackets for remarkable heat and abrasion resistance necessary to withstand the harsh environment of the engine compartment. These original equipment spark plug wire sets have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.