EXHIBIT 21 SUBSIDIARIES ------------ City Truck and Trailer Parts of Alabama, Inc., an Alabama Corporation City Truck and Trailer Parts of Alabama, L.L.C., an Alabama Limited Liability Company City Truck and Trailer Parts of Tennessee, Inc., a Tennessee Corporation City Friction, Inc., an Alabama Corporation Truck & Trailer Parts, Inc., a Georgia Corporation Truckparts, Inc., a Connecticut Corporation Associated Brake Supply, Inc., a California Corporation Associated Truck Center, Inc., a California Corporation Onyx Distribution, Inc., a California Corporation Associated Truck Parts of Nevada, Inc., a Nevada Corporation Freeway Truck Parts of Washington, Inc., a Washington Corporation Tisco, Inc., a California Corporation Tisco of Redding, Inc., a California Corporation Active Gear, L.L.C., a Washington Limited Liability Company Superior Truck & Auto Supply, Inc., a Massachusetts Corporation