Precise Fit for GM V8 Engines: Designed for 2007-2014 Chevy Silverado/Suburban/Avalanche/Tahoe and GMC Yukon/Sierra with 5.3L/6.0L/6.2L V8 engines. Replaces OEM plugs 3186, 12680072 and wires M8-48322, 48322.
Iridium Performance Boost: Iridium core delivers stronger spark for improved combustion, faster starts, smoother idle, and better fuel efficiency.
Dual-Layer Silicone Wires: High-tear silicone jacket with fiberglass layer resists heat and prevents electrical leakage, protecting engine components.
Pre-Gapped & Plug-and-Play: Spark plugs pre-gapped (0.040 inch), wires direct OEM replacement. No modifications needed. Install with basic tools.
Complete 8-Cylinder Kit: Includes 8 plugs + 8 wires for full engine service. For gasoline engines only (not compatible with diesel).