NEW IGNITION SPARK PLUG WIRES SET FOR SILVERADO 99-UP TAHOE YUKON 2002-UP V8 5.3L 6.0L HIGH PERFORMANCE 8 mm Made in USA SILICONE JACKET CARBON CORE CONDUCTOR WITH LOCK PINS CONNECTOR FOR BETTER CONTACT AND LONGER LIFE 8.0 mm YELLOW CABLES OR BLUE SILICONE BOOTS TO RESIST MORE TEMPERATURE HIGH PERFORMANCE MADE IN USA