DENSO Racing Spark Plugs (like this IRE01-31) are made for the harsh conditions encountered while race driving, with a 100% platinum 0.8mm ground electrode and an ultra-fine 0.4mm iridium allow center electrode. These factors, along with the specially hardened insulator make for a spark plug that greatly improves ignition performance and is more capable in hardcore racing applications.
SPECIFICATIONS
Torque Specs: Cast Iron: 26-30 lb. ft. Aluminum: 15-22 lb. ft.
