What is the difference between Fluidampr and Streetdampr?

Fluidampr is SFI accepted, which is a requirement for many racing sanction bodies. This means that it will not explode at 12,500 rpm. Fluidampr is designed to withstand the most severe racing applications. Fluidampr's exterior is coated with a black zinc chromate finish and is degreed in 2 degree increments from 0 to 50, with additional marks at 90, 180, and 270 degrees (except Ford Small Block Fluidampr). Fluidampr is recommended for high performance race and street applications, but can be used on mild street engines as well.

Streetdampr is a low cost version of Fluidampr. Streetdampr is designed for mild street applications and for racing applications, which do not require an SFI accepted damper. It is designed as a replacement for the stock damper. Streetdamprs are shipped with a rust preventative and should be painted before installation. They are degreed from 0 to 40 in 2 degree increments. Streetdampr's are designed for extremely long life in mild and medium performance engines.