Apparently the folks at SRT thought Viper owners would benefit from a “Rain Mode” stability and traction control setting, and they’re probably right. For model year 2014, the setting has been added to the base Viper’s On and Off modes, and the Viper GTS’s and TA Special Edition’s On, Sport, Track and Off modes, according to Chrysler’s blog.

Rain Mode is intended to act as a security blanket when driving conditions turn wet or cold, both of which can drastically affect the handling characteristics of the already somewhat hard-to-drive, 640-horsepower sports car. Erich Heuschele, manager of SRT vehicle dynamics, says the setting was tuned on both dry and wet roads.

The Viper also is receiving new color options. Billet Silver, the primary color of the Viper GTS-R race car, and GTS-R Blue now can be optioned, but the latter replaces Shadow Blue Pearl. (Collectors, are you listening?) Viper GTS models ordered with the Anodized Carbon Special Edition package, Chrysler says, will get a matte black paint finish.