Turbo Chambered muffler, Made from 304 stainless steel for maximum corrosion resistance. This muffler has 2 ID center inlet and a 2 OD center outlet with a 2 core and shell size 4 x 8 x 14 with an overall length of 18 with a mill finish. Stainless Works is the only manufacturer to make the body, core, and packing out of 304 stainless steel. Exclusive louvered core creates a sweet Street Rod deep tone that is very aggressive. These are TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.