Premium Iridium Spark Plug for Chevrolet, Cadillac, Hummer H2

High-performance iridium tip ensures superior ignitability and extended service life. Precision-engineered electrode design reduces voltage requirements, enhancing fuel efficiency and minimizing misfires.

Direct replacement for OEM part numbers 12621258 and 41-110, guaranteeing perfect fit for GM 5.3L/6.0L V8 engines. Laser-welded construction prevents corrosion and maintains consistent spark gap under extreme temperatures.

Optimized for heavy-duty applications including towing, off-roading, and cold-start conditions. Nickel-plated shell resists carbon buildup while triple-seal gasket prevents combustion gas leakage.

Engineered for vehicles requiring maximum durability: Chevrolet Silverado/Tahoe, Cadillac Escalade, Hummer H2. Drop-in installation with factory torque specifications—no ECU recalibration needed.

Bulk purchase available for commercial repair shops and fleet managers. Ships globally with OEM-grade packaging to prevent transit damage. Performance tested to exceed SAE J2598 standards.