The Spark Plug Heat Range DETERMINATOR® is the only way to properly manage the powerful heat range function of the spark plugs, telling you exactly how many heat ranges you must switch to remove fast and accurately, the heat excess of the combustion chambers of your high performance modified or racing engine, no matter how much is it stressed; to achieve the peak power safety, without losing power; while keeping the engine totally free and safe from overheating, pre-ignition, or detonation, and its harmful effects.

Also the Spark Plug Heat Range DETERMINATOR® is the ultimate tuning device worldwide that can tell you if the stock spark plug heat range is no longer the right for you and how many heat ranges you must switch to properly select the customized spark plugs, to fine tune-up your standard daily use vehicle to best match your particular driving habits and/or engine operating condition.

Spark Plug Heat Range DETERMINATOR® is result of more than 20 years of research by a proffesional team that has tested thousands of high performance modified and racing engine´s and standard daily use vehicles, with: gasoline, ethanol, nitrometane, alcohol and gas engines, be them with carburetor or fuel injection; with conventional, or electronic, or computerized ignition system; be them foreign or domestic: cars, light trucks, sport compacts, SUVs, vans, off roads, motorcycles, ATVs, boats, personal watercrafts, snow-mobiles, etc, and works well in all the spark plug brands.

The Spark Plug Heat Range DETERMINATOR® includes the valuable book "THE RE-ENGINEERING OF TUNING" which contains:

• Step by Step how to correct heat range problems and fine tune standard or high performance modified engines,
• Solutions Guide with the only troubleshooting guide in the world to quick and properly identify if the actual root cause of the spark plug tip´s appearance is due to a probable mechanical trouble, or owed to the stock spark plug heat range is no longer the right to your particular driving or operating conditions that affects the engine, or due to the power achieved by your high performance modification level,
• The Spark Plug Codes, the most comprehensive identification of the Heat Range number in the Numbering Systems of the different Spark Plug Brands, that is unique on the world.
• Pro-Tips, with the advice of top-expert engine tuners with more than 25 years of experience in racing and standard vehicles,
• Among other very valuable knowledge, available nowhere else.