The HKS exhaust gas temperature (EGT) gauge is the best mid-priced unit we have ever used.  If you have a turbocharged or supercharged car, a high quality EGT gauge is critical for engine tuning.

The HKS EGT gauge reads from 500 degrees Celsius to 1200 degrees Celcius (which equals approximately 932-2192 degrees F.)  It features a 30 second record and playback mode, a multi-stage warning light function, and a...

Whether you have a normally aspirated or forced induction engine, any serious engine modifications will require the use of an Air/Fuel ratio gauge to warn you if the mixture is too lean or too rich.

Auto Meter's 2"electrical A/F ratio gauge uses 20 small LEDs arranged in a sweeping pattern to indicate "lean,""stoichiometric,"and "rich."  Although the Auto Meter gauge is not as accurate as a wide band Lambda sensor,...

If you have a turbocharged or supercharged engine, a boost gauge is critical for monitoring your forced induction system.

The VDO boost gauge measures from 30 in/Hg manifold vacuum all the way up to 25psi of boost.  Gauge is 2-16"diameter and backlit for night time operation.