This product is designed to work with most modern cars, but as I get customer feedback
 of successful installs on specific makes and models I'll post them here

S2000 - Originally designed for the Honda S2000, this product works on all model years.

Dodge Viper - The 10-cylinder Viper is a little unusual, having a tach signal similar to a 5-cylinder car but at a much lower voltage (under 3 volts). Don Ruckman, an experienced Viper owner, was kind enough to do a test install and provided valuable information so I could alter the design to fit the Viper's unique characteristics.   Download Don's Viper Installation Manual and see his post on viperclub.org

Noble - Confirmed as compatible but no details on the install yet.

MazdaSpeed 3  - This car uses a 1-cylinder tach signal so I had to build a special software version.  If You want one, email me to place the order, no change in price for the special build.  See here for a Mazda forums post made by my "test user".

Mitsubishi Evolution - Got a report back from an Evo owner that says it works great but he didn't provide any details.