Nissan 180SX S13 Spark Plug CA18 (Range 5)

The Nissan 180SX S13 with its CA18 engine requires precision ignition components to deliver reliable performance, whether in daily driving or spirited use. Spark plugs play a critical role in engine efficiency, and selecting the correct heat range ensures both power and durability. The NGK range 5 spark plug is the proper choice for stock or lightly modified CA18 applications, offering the right thermal balance for consistent combustion.

In naturally aspirated or mildly boosted engines, a hotter plug such as a range 5 helps prevent fouling and misfires by retaining enough heat to keep the firing tip clean. This ensures smoother operation, stable idle, and dependable performance under normal driving conditions. For the CA18, the range 5 plug provides the ideal balance, making it the go-to choice for unmodified or lightly tuned setups that see regular road use.

By contrast, more aggressive turbocharged or track-driven applications may require colder plugs, such as a range 6, to handle higher combustion pressures and temperatures. Using a plug that is too hot in such conditions risks pre-ignition or detonation, which can cause serious damage. On the other hand, selecting too cold a plug for a street-driven car can lead to fouling and poor drivability.

At Terra Firma Automotive, we supply the original NGK range 5 spark plugs for the Nissan 180SX S13 CA18, ensuring you get the correct factory-specified part to keep your engine running at its best.

• Sold as each, 4 required.