Due to slow sales, Fiat Chrysler Automobiles will halt production of the SRT Viper for the next two months, with 91 hourly workers temporarily booted to the unemployment line.

Automotive News reports the Conner Avenue Assembly Plant in Detroit will go into hibernation beginning April 14, with production to resume June 23.

Speaking of 91, that was the number of Vipers sold in the United States between January and February of this year, with a 412-day supply of 756 unsold vehicles as of March 1.

Factors leading to the temporary shutdown include unseasonably cold weather, and the habit of dealers keeping the doors locked on the exotic car, hindering sales. SRT brand head Ralph Giles aims to change the latter through a factory team tour of the U.S. already underway in the South, allowing customers to take the Viper for a test-drive. The tour will expand north once warmer weather arrives.