The bellows kit is designed to meet or exceed specifications. The bellows kit will fit exactly. If you have ever overheated your engine, bellows and flaps tend to get damaged. Often you will find pieces of them in the exhaust system when you remove the drive for service. These help prevent the from entering the engine through the exhaust system, so are very important. Replaces for: 807166A3, 32-14358T, 32-44348T, 18-2746, 18-2748 Bellows and flaps are designed for the following applications: Bellows and flaps are designed for the following applications: For 1982-1996 engines, some 1996 and 1997 models apply. Fits 4 inch oval Y-pipes with round pinholes. If you have two rectangular holes for eyelets, you will need the A1 blanking plug. If your Y-pipe changes size a few inches below the blanking plug, you have a one-piece V6 Y-pipe and need an A2 blanking plug. Clamps are included. 2x Roller Shutters / Flaps - 807166A3 2x Lower Exhaust Bellows - 32-14358, 32-14358T, 32-14358001, 18-2746