After winning the 1988 Central States District Competition in their first attempt, they began a steady climb up the International Competition ladder which culminated in Calgary, Alberta, Canada, where they were awarded the 1993 International Quartet Championship.
They also sang extensively in Canada and performed around the world, singing in 15 countries.
Major highlights included: On June 3, 2004, the quartet announced their retirement at the end of 2005.
As a part of their 25th-anniversary performance on the 2018 Association of International Champions Show, the Gas House Gang shared a tribute to their original baritone Rob Henry, with some help from his son, Ryan.
Several prominent barbershop singers helped fill in after Rob's death, to fulfill show obligations.