MagnaFlow Performance mufflers are 100% stainless steel and lap-joint welded for solid construction and rugged reliability even in the most extreme conditions. They feature a free-flowing, straight-through perforated stainless steel core, stainless mesh wrap and acoustical mineral based rock wool to deliver that smooth, deep tone.Backed by a Lifetime Warranty. View the entire product line below, or select the style from the 2 options above.