|  | 66-71Int. & Exh.  2.120" Free Ht.  With damper.  (4 pack). | 
                    
                        
                             |  | 63-65Int. & Exh.  HP & Police only.  2.120" Free Ht.  With damper.  (4 pack). | 
                    
                        
                             |  | 66-70Int. & Exh.  2.120" Free Ht.  With damper.  (4 pack). | 
                    
                        
                             |  | 77-78Int. & Exh.  Engines with 2.120" springs only.  2.120" Free Ht.  With damper.            (4 pack). | 
                    
                        
                             |  | 72-76Exhaust.  F-150/250/350.  2.120" Free Ht.  With damper.  (4 pack). | 
                    
                        
                             |  | 68-72Int. & Exh.  2.120" Free Ht.  With damper.  (4 pack). | 
                    
                        
                             |  | 72-76Intake.  2.120" Free Ht.  With damper.  (4 pack). | 
                    
                        
                             |  | 73-76Intake.  F-100.  2.120" Free Ht.  With damper.  (4 pack). |