Smooth oval Muffler, Made from 304 stainless steel for maximum corrosion resistance. This muffler has 2-1/2" ID center inlet / outlet with a 2-1/2" core and a body of 2-1/2" x 4-1/8" and overall length of 24" with a mill finish. The smallest, most compact muffler available! Rumbles at idle, quiets at speed. Reversible design lets you pick the sound level you want! These are TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.