NGK 5666 Spark Plug - High-Performance Ignition Solution for Powersports Vehicles

Upgrade your powersports engine's performance with NGK's high-quality 5666 spark plug. This essential ignition component ensures optimal combustion for improved power, efficiency, and reliability in motorcycles, ATVs, and UTVs.

Key Features

• Iridium Electrode: Provides superior ignition efficiency and longer service life for consistent engine performance.
• Threaded Design: Precision-engineered 14mm x 1.25 thread size ensures perfect fitment in compatible powersports engines.
• Heat Range Optimization: Balanced heat dissipation prevents overheating while maintaining efficient combustion temperatures.

Why Choose This Product

NGK's 5666 spark plug combines advanced materials with durable construction to deliver exceptional reliability in demanding off-road and high-performance environments. Its long-lasting design reduces maintenance frequency, while precise ignition timing enhances throttle response and fuel economy. Trusted by professionals and enthusiasts alike, this spark plug ensures your powersports vehicle operates at peak efficiency under all conditions.