Most vehicles only require the installation of one Cal Cat unit. That being said, there are a few exceptions.
- Large Engines - We recommend using 2 or more units on VERY large engines. (Such as a V10 or above.) This is primarily done in order to keep up with the engine's fuel demand.
- Heavy Loads - If you plan to be hauling large loads (such as a large trailer over long distances) We recommend using 2 units, again in order to keep up with fuel demands.
- Extra High Performance - When even additional performance is desired, two units can be installed in parallel to maximize effect. For an example, in our compeition vehicle, we are utilizing two units even though we are only using a 4-cylinder engine.