SEMA closes deal for SEMA Garage property in Michigan SEMA closes deal for SEMA Garage property in Michigan Print PLYMOUTH, Mich. — The Specialty Equipment Market Association (SEMA) has closed on its deal to buy a 45,000-sq.-ft. building in Plymouth that it plans to convert to a second "SEMA Garage" to complement the existing SEMA Garage near SEMA headquarters in Diamond Bar, Calif. The new facility in Plymouth — to be known as SEMA Garage Detroit — "opens up new doors and opportunities," Mike Spagnola, SEMA vice president of OEM relations and product development, said. Mr. Spagnola had briefed members of SEMA's Wheel & Tire Council in