【Large Diameter】 Features a 4" OD. This end is designed to fit inside any standard 4" ID exhaust pipe or component
【Small Diameter】 Features a 3" ID. This end is designed to fit over any standard 3" OD exhaust pipe or component
【Dimensions & Material】 The overall length is 4 inches and the metal thickness is 1 mm. Made of quality 304 stainless steel for lasting durability
【Leak-Free Connection】 Highly suitable for connecting components of different sizes. When welded to two metal pipes, it forms a tight, reliable seal against leaks
【Smooth Transition】 The adapter effectively eliminates the gap and achieves a nice transition from 4" to 3". (Please check the detailed size before purchasing)