A new variant of AleSmith Brewing Co.’s popular Speedway Stout is in the works, but only members of the brewery’s club will be able to get it.

Barrel-Aged Jamaica Blue Mountain Coffee Speedway Stout is a 13 percent ABV imperial stout brewed with Blue Mountain coffee sourced from Mavis Bank Estate in Jamaica and aged in bourbon barrels. As the name suggests, the base beer is the San Diego-based brewery’s Jamaica Blue Mountain Coffee Speedway Stout, which debuted in 2014.

According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), the new variant will be packaged in 750ml bottles and will be an exclusive release for members of AleSmith’s Order of the Anvil club, which is the brewery’s membership club that debuted last year.

An email sent to the brewery for additional information was not immediately returned.