High-Performance Spark Plugs for Optimal Engine Efficiency

Premium copper-core electrodes ensure superior conductivity and heat dissipation, extending plug lifespan. Precision-engineered ceramic insulator withstands extreme temperatures up to 1,500°F (815°C) while preventing voltage leakage. Multi-ground electrode design (8#41 series) enhances ignition reliability for gasoline engines under heavy loads.

Direct-fit replacements for GM/Delphi OEM numbers (12622561, 12621258, etc.) with laser-etched anti-counterfeit coding. Cold-forged steel shell with triple-layer chrome plating resists corrosion in humid/salty environments. Ideal for commercial vehicles, marine engines, and industrial equipment requiring 14mm thread size.

Batch-tested under SAE J548 standards with ≤0.5% defect rate. Bulk packaging reduces per-unit cost by 30% versus retail boxes. Compatible with ethanol-blended fuels (E10-E15) without gap erosion. Minimum order: 50 units (mixed SKUs accepted). Global air shipping available for urgent restocking.