NGK Iridium Spark Plugs Heat Range #7 – Ford Focus RS LZ (2016–2017)

NGK Iridium Spark Plugs in Heat Range #7 are one step colder than stock and ideal for modified Ford Focus RS engines. These plugs are designed to handle the increased combustion temperatures found in high-boost and high-power setups, offering improved ignition efficiency, durability, and heat resistance.

Recommended for vehicles with heavy modifications or those producing approximately 100+ horsepower over stock, these plugs ensure smoother engine performance, reduced misfires, and increased reliability under demanding conditions.

Why Choose NGK Iridium?
- One step colder than OEM for tuned/mapped applications
- Iridium centre electrode with superior anti-oxidation and anti-erosion
- Better ignition performance and fuel efficiency
- Lower required voltage and reduced fouling
- High melting point and enhanced durability
- Corrosion-resistant metal shell with advanced plating process

Fitment:
- Ford Focus RS (LZ) 2016–2017

Please Note:
1. Iridium plugs support larger gap settings with less voltage. Some users re-gap to tune for spark delivery, but gapping tools must be used with care. Avoid slide-type gappers to prevent damage to the iridium tip.
2. Price is for a set of 4 spark plugs.