NGK 49473 Ignition Coil

NGK MOD High-Performance Ignition Coil

NGK MOD High-Performance Ignition Coil Multi-Pack is built for distributorless ignition systems that need stable voltage delivery and consistent spark performance. This NGK ignition coil uses custom primary and secondary windings, a PET housing, vacuum-sealed epoxy resin, and a high-temperature silicone COP boot to support durability in demanding street and performance use.

Compatible With 1999-2007 Chevrolet Silverado, 2000-2006 Chevrolet Tahoe, and 2000-2006 GMC Yukon applications, this coil is engineered for enthusiast vehicles that rely on coil-on-plug ignition. Part number 49473 is also identified as M5328-8 in interchange data.

Key Features

• Distributorless ignition coil with COP (coil near plug) design
• 12-volt electrical system application
• Custom primary and secondary windings for optimized output
• PET housing with vacuum-sealed epoxy resin for insulation and durability
• High-temperature silicone COP boot for dielectric strength and voltage control
• Bolt-on mount type with 2 mounting holes and 1 connector
• Female connector and male blade terminals
• Performance grade ignition coil for enthusiast and performance vehicles

Product Details

NGK’s MOD High-Performance Ignition Coil Multi-Pack is part of the NGK MOD product line, developed for vehicles that demand stronger ignition performance and dependable spark delivery under load. The coil design is tested in an ISO 17025 accredited lab under severe conditions, and NGK states these coils are engineered to work at their best when paired with NGK spark plugs. For buyers searching for an ignition coil for Chevrolet Silverado 1500, GMC Sierra 2500 HD, or Cadillac Escalade ignition service, this part number 49473 provides a direct-performance replacement option.

This part cross-references Standard Ignition UF-271 and DENSO Auto Parts 673-7000 for the same application.

Common Problems It Can Address

• Misfire caused by weak or inconsistent spark output
• Hard starting related to ignition coil degradation
• Rough idle from unstable coil performance
• Loss of throttle response under load
• Ignition breakdown in high-temperature operating conditions

Installation Notes and Tips

Verify connector style, terminal layout, and mounting points before installation. This coil uses a bolt-on mount, a female connector, and male blade terminals, so matching the original ignition coil configuration is important for proper fitment. For best results, inspect spark plugs and related ignition components during service, especially on high-mileage Chevrolet Silverado, GMC Sierra, and Cadillac Escalade applications.

Quality Assurance

NGK develops and tests MOD ignition coils in an ISO 17025 accredited laboratory to validate performance under severe operating conditions. The coil construction uses materials selected for insulation, voltage control, and long-term durability in distributorless ignition systems.