Mirror finish. Straight-Throug Design. Welded center - center. Smooth and deep tone. Get more horsepower with a nice sound. These MagnaFlow performance mufflers are designed to give you more power and provide excellent sound. They feature a large-diameter, perforated stainless steel core and a straight-through design for unrestricted flow. They also have a stainless steel mesh for sound control, and all-welded, lap-jointed contacts to avoid distortion or cracking at the seams.