1. High Quality Construction - 135 degree ceramic boots rated to withstand up to 2000°F - Heat-resistant materials and construction prevent degradation and electrical issues under extreme conditions - Contributes to smoother operation, better throttle response, increased power output, and enhanced engine efficiency 2. Premium Performance and Durability - 500 ohms per foot ferro-spiral core provides high level RFI/EMI suppression - Minimizes energy loss and reduces electrical current reaching the spark plugs - Improves ignition efficiency and spark performance - Stainless steel plug terminals - 8mm double silicone construction black wire with a silicone jacket rated to 600°F - Engine bay capable: high temperatures, vibration, oil and other contaminants - Designed for long-lasting performance and durability 3. Vehicle Compatibility - Fits Cadillac, Chevy and GMC vehicles - Includes Cadillac 2006-2007 CTS, 2007-2008 Escalade ESV EXT - Chevy 2007-2008 Avalanche, 2005-2008 Corvette, 2008 Express 1500 2500 3500, 2006-2008 Impala, 2006-2007 Monte Carlo, 2007-2008 Silverado 1500 2500HD 3500HD, 2005-2006 SSR, 2007-2008 Suburban 1500 2500 & Tahoe, 2006-2008 Trailblazer EXT - GMC 2005-2008 Envoy XL, 2008 Savana 1500 2500 3500, 2007-2008 Sierra 1500 2500HD 3500HD, 2007-2008 Yukon XL 1500 XL 2500 and more - Please check the description for additional compatibility details 4. Replaces Part Number - Replaces Accel spark plug wires 9070C - Custom fit for extreme heat ceramic boot ferro-spiral core spark plug wire set for GM gen 4 LS3/LS4/LS7 engines - Simplifies the replacement process and ensures proper connections, saving time and effort 5. Practical use scenarios - Upgrading ignition on GM gen 4 LS3/LS4/LS7 engines for improved ignition efficiency, throttle response, and overall performance in street or performance applications - Operating in hot or demanding engine bays where high temperature resistance, vibration tolerance, and exposure to oil or contaminants require durable wiring - Routine maintenance or replacement during performance upgrades to ensure reliable connections and EMI/RFI suppression across supported Cadillac, Chevy, and GMC vehicles