GReddy spark plugs come with high quality 0.6mm dia. Iridium electrode that guarantees improved durability. In order to decrease heat and chances of pre-ignition, GReddy spark plugs are designed in cooler heat ranges. GReddy offers several series of spark plugs. The Iridium Tune spark plugs are built for use on medium tuned engines, factory turbocharged engines or bolt on turbo kit equipped vehicles. The PRO series includes spark plugs with a Platinum ground electrode for maximum endurance even in severe driving conditions. GReddy also provides a series of high performance spark plugs that are suitable for racing competitions, such as N1 racing.

GReddy is a division of The Trust Company LTD, a Japanese company founded more than 30 years ago. GReddy manufactures a variety of high quality automotive parts and accessories, such as exhaust systems, turbo kits, cooling systems, electronics, and many more. Since 1994, GReddy Performance Products does the development and distribution of Trust Company products in the United States. GReddy was founded and managed by racers and enthusiasts, and therefore, its main goal is creating products that enhance vehicle's performance. No matter if you're looking for all-out race performance or you just want to slightly improve your car's performance, GReddy will provide a solution that perfectly suits your preference.