NGK R7420 Spark Plugs

  • Sale
  • $134

The NGK iridium "race" plug for use with high powered Mazda rotary combinations. Available in 10 and 11 heat ranges. We have had great success with the 10 plugs on daily driven applications and generally recommend this plug up to the 500 whp range. For serious performance applications beyond that level, the 11s are available. Price is for a set of four spark plugs.