The main ignition system components include the ignition coil, distributor (on older applications), spark plug wires, spark plugs, and ignition control modules. Modern systems may also use coil packs or coil-on-plug setups instead of distributors.

Upgraded ignition components can improve engine efficiency, throttle response, and spark consistency. While they may not add large horsepower gains alone, they support better combustion and are essential for high-performance or modified engines.

Ignition components should be replaced when you notice misfires, rough idle, poor fuel economy, or hard starting. Spark plug wires and coils can wear out over time, especially in high-heat environments or performance applications.

High-performance engines benefit from low-resistance spark plug wires, high-output ignition coils, and heat-resistant materials such as ceramic plug boots. These components help maintain strong spark delivery under demanding conditions.

Ceramic boot ignition wires are ideal for applications with high exhaust heat, such as vehicles with headers or turbochargers. They can withstand significantly higher temperatures than standard boots and help prevent burn-through and misfires.

HEI (High Energy Ignition) systems are a type of electronic ignition that integrate the coil and distributor into one unit, commonly found in older GM vehicles. Modern electronic ignition systems often use coil packs or coil-on-plug designs for improved efficiency and control.

Choosing the right ignition components depends on your engine type, modifications, and intended use. Consider factors like vehicle fitment (Chevy, Ford, LS), heat exposure, performance goals, and whether you need universal or application-specific parts.