A car's exhaust tip size is determined by measuring from the clamp to the end of the tip. The stock Taurus SHO exhaust tip is three inches. However, the aftermarket exhaust market offers many other sizes, including 4-inch, 5-inch and even 7-inch tips. Be sure to choose a tip with an inlet diameter that will fit your exhaust pipe diameter. The MRT Street Performance Axle Back for the 2010+ Taurus SHO has 4-inch tips that come with a standard polished stainless steel or optional black matte finish.