This exhaust butterfly valve has a 3 inch inlet diameter and a 3.5 inch exterior diameter. It comes in a sleek silver color and is made of durable stainless steel. The valve can be either bolted or welded onto the exhaust and is designed for use on cars and trucks. The valve is a performance part with a matte finish and is uncoated (unfinished). It is not a vintage part and has universal fitment. This product is manufactured in China and is brand new from SXTH Element. Please note that this item is not sold with any reference to its condition.