This muffler features a 3.5" diameter turndown style tip. (4 inch version have 4 inch inlet and 4 inch tip) The tip is made from pie-cut pieces that are beautifully tig welded together. Back purge tig welding is used to keep the welds super clean, and ensure proper penetration and weld strength. The whole muffler is finished in brushed stainless steel with our 1320 logo etched across the top of the muffler body. The compact round body design is perfect for installation in tight spaces and also offers a 5+lbs weight reduction over larger oval style or oem mufflers.