Rat trap muffler, Made from 304 stainless steel for maximum corrosion resistance. This muffler has 2 - 14 ID center inlet outlet with a 2 - 14 core. Exclusive louvered core creates a sweet Street Rod deep tone that is not overly aggressive. It is 3 - 12 body with turn down style tip (24 overall length), Mill finish. These are TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.