MBRP's exhaust kits for the 2011 and up V6 Mustang feature T304 stainless steel mufflers for a lifetime of us. These stylish exhaust kits feature polished 4" exhaust tips with the MBRP logo on the tip. The axle-back and cat-back exhaust kits can give you 3 HP and 6 HP respectively. Enjoy the great deep tones of MBRP! Product Benefits Aggressive sound Great fitment and everything included for the install Made from high-quality stainless steel in the USA