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High performance Iridium racing plug for the 315, much improved over standard.

We have always used these plugs in our 315's with excellent results/

NGK official blurb..-

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling.


  • Fine iridium tip ensures high durability and a consistently stable spark
  • Iridium alloy has extremely high melting point, perfect for high-performance engines
  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
  • Outstanding acceleration, high fuel efficiency and durability
  • Ultimate design, technology and performance

Cota 315 racing plug

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