Maestro (20HA50AA, 20HC51AA, 20HC81, BB) (1992 - 1994)
                
             | 
                        
                | Modification |                                                             Height | 
                                                                                Outside diameter 1 | 
                                                                                Outside diameter 2 | 
                                                                                Inlet diameter | 
                                                                                Outlet diameter | 
                                                                                Outside diameter | 
                                                
                            
                    | 2.0 BB |                                                                         160 mm | 
                                                                                                - | 
                                                                                                - | 
                                                                                                - | 
                                                                                                - | 
                                                                                                84 mm | 
                                                            
                         
                    
                Maestro (20HA50AA, 20HC51AA, 20HC81, BB, BA) (1990 - 1992)
                
             | 
            
                 | 
                     
                  | 
                        
                | Modification |                                                             Height | 
                                                                                Outside diameter 1 | 
                                                                                Outside diameter 2 | 
                                                                                Inlet diameter | 
                                                                                Outlet diameter | 
                                                                                Outside diameter | 
                                                
                            
                    | 2.0 BA |                                                                         160 mm | 
                                                                                                - | 
                                                                                                - | 
                                                                                                - | 
                                                                                                - | 
                                                                                                84 mm | 
                                                            
                         
                    
                Maestro (20HA50AA, 20HC51AA, 20HC81, BB, BA, 20HB63) (1989 - 1991)
                
             | 
                        
                | Modification |                                                             Height | 
                                                                                Outside diameter 1 | 
                                                                                Outside diameter 2 | 
                                                                                Inlet diameter | 
                                                                                Outlet diameter | 
                                                                                Outside diameter | 
                                                
                            
                    | 2.0 20HA50AA |                                                                         156 mm | 
                                                                                                81 mm | 
                                                                                                74 mm | 
                                                                                                8 mm | 
                                                                                                8 mm | 
                                                                                                - | 
                                                            
                            
                    | 2.0 20HC51AA |                                                                         156 mm | 
                                                                                                81 mm | 
                                                                                                74 mm | 
                                                                                                8 mm | 
                                                                                                8 mm | 
                                                                                                - | 
                                                            
                            
                    | 2.0 20HC81 |                                                                         156 mm | 
                                                                                                81 mm | 
                                                                                                74 mm | 
                                                                                                8 mm | 
                                                                                                8 mm | 
                                                                                                - | 
                                                            
                            
                    | 2.0 20HB63 |                                                                         156 mm | 
                                                                                                81 mm | 
                                                                                                74 mm | 
                                                                                                8 mm | 
                                                                                                8 mm | 
                                                                                                - |